Impact drivers are often used in place of impact wrenches. But they aren’t the same tool, and you should never use an impact driver when an impact wrench is called for.
Impact Driver or Wrench – Which Tool do I need? When do I use each one? Why would I want to buy both tools instead of just one or the other?
We’re going to answer all these questions today! If you don’t know what an impact wrench vs. an impact driver is, this article will help explain that difference. Then we’ll talk about how you can use each tool and why you might want both of them on your workbench instead of just one or the other…or if it’s even possible to have only one or the other on your bench at any given time!
Comparison Chart: Impact Wrench Vs. Impact Driver
| Impact Wrench | Impact Driver | |
| Drive | 1/2″ Square Drive | 1/4″ Hex Drive |
| Speed | up to 2000 RPM | up to 3600 RPM |
| Torque | up to 1000 ft-lbs | up to 125 ft-lbs |
| Size | ~9 in long / 5-6 lbs | ~5 in long / 3 lbs |
What is an Impact Wrench, and What is it Used For?
An impact wrench is a power tool used in place of a ratchet and sometimes in place of a torque wrench. It is designed to remove lug nuts from vehicle wheels when replacing tires or when doing other repairs. The tool has an electric motor, the “impact mechanism,” and a rotating socket. The rotating socket is driven by gears designed to spin at 3,000-26,000 rpm as the motor runs.
This means it has a lot of power, but the actual force being applied is minimal or light compared to other tools that provide torque, such as ratchets and wrenches. Because of this high-speed motor design, the socket must be driven by a break-away torque converter that absorbs the impact energy, just like the clutch of an air impact wrench.
When using an impact wrench, there is no need to use other tools or assistance while changing tires. Impact wrenches also come with several sockets that are compatible with different lug nuts. This way, you don’t have to carry around an extra set of sockets. The socket is connected to the rest of the tool via a heavy-duty cable, often between 5 and 10 feet long.
This type of wrench comes in both corded and cordless models, so you can choose between portability or power depending on what you need for your specific job.
When do you Use an Impact Wrench?
Since this power tool makes it easy to remove lug nuts, an impact wrench is best used for automotive work. You can use it on any car or truck that has lug nuts on the wheels. Because of its ease of use and dependability, professionals frequently use impact wrenches in automotive garages to remove and replace tires.
When not to use an impact wrench:
Although there are several situations where you can use an impact wrench, it is important to understand when not to use them. For example, you should never use one of these tools to apply a specific amount of torque or pressure. An impact wrench only provides the ability for the user to drive a nut or bolt without having to continually re-tighten their grip.
In addition, you should never use impact wrenches in situations where there is a risk of explosion or damage to nearby materials. For example, you should not use an impact wrench to remove oil pan bolts to change the oil in your car engine because combustible fumes may be present in the area.
Advantages of using an impact wrench:
- The design makes it easy to control how much torque you apply, which is especially useful for delicate jobs where you don’t want to strip your lug nuts or other fasteners.
- They are usually cordless, so they can be taken anywhere, even out of the garage, if needed. This feature makes an impact wrench perfect for emergency roadside repairs.
- There is no need to use another tool or have anyone help you while changing tires or performing other automotive tasks.
- The additional sockets are convenient, so you don’t have to carry around a set of regular wrenches as well.
Disadvantages of using an impact wrench:
- Some models are bulky and heavy, making them hard to use for long periods of time.
- They tend to be more expensive.
Top Impact Wrenches
1. PORTER-CABLE Impact Wrench
The Porter-Cable impact wrench is designed for both home and professional use. It is equipped with a 1/2-in hog ring anvil, which makes it very simple to change sockets. This unit also features a forward/reverse rocker switch that allows for easy operation. The powerful 7.5 Amp motor provides speeds of up to 2,700 BPM (beats per minute). It also has an adjustable power regulator, which allows for various fastening situations.
The unit is rated at 450 ft-lbs of torque. It weighs 7.5 pounds and measures 13 inches long by 4 inches wide by 11 inches tall, making it larger than other options on the market but smaller than most corded impact wrenches.
Pros
- Powerful motor for heavy-duty applications
- durable front housing
- secure power cable
Cons
- hog ring doesn’t have good socket retention
- not good for tight spaces
2. DEWALT 20V MAX Cordless Impact Wrench Kit with Hog Ring
The Dewalt Cordless Impact Wrench Kit is lightweight and compact. It features a 1/2 inch hog ring anvil for easy socket changes. The Dewalt cordless impact wrench is equipped with a 20V MAX battery that includes a fuel gauge to let you know how much life your power pack has left.
This tool can reach speeds of up to 2,400 BPM and delivers 150 ft-lbs of torque at a maximum. It’s smaller than most cordless impact wrenches, measuring 5 inches by 5.6 inches by 10.8 inches and weighing 3.4 pounds without the battery included. The compact design allows this tool to fit into all kinds of tight spaces.
The Wrench Kit features 2-speed settings that allow for various fastening situations. Three work lights are located around the chuck collar activated when the trigger switch is pressed and light the immediate work surface.
Pros
- Lightweight and small enough to be portable
- Comes with a fuel gauge on the battery, so you always know how much power you have left
- 2 batteries, charger, and carry bag included
- long battery life
Cons
- some find it lacking power
- more expensive
3. AVID POWER 20V MAX Cordless Impact Wrench
The Avid Power Cordless Impact Wrench is top of the line in terms of productivity. Its performance can be attributed to its premium high spec motor that delivers a maximum tightening torque of 330 ft-lbs and loosening torque of 369 ft-lbs.
This tool also features a variable-speed trigger with a built-in lock button, allowing for more control over your tool when you need it. It can achieve great impact with a rate of up to 2700 BPM.
This is one of the larger cordless impact wrenches on the market. It measures 14.13 inches by 4.06 inches by 10.47 inches and weighs 4 pounds without a battery included. The built-in LED light allows for work to be done even in low lighting conditions.
Pros
- The variable speed trigger gives the consumer more control over their impact wrench
- Includes an LED light for working in low lighting conditions
- fast 60-90 minutes charging time
Cons
- The larger dimensions of the unit can make it difficult to carry around for extended periods of time
- not great for tight spaces
4. DEWALT 20V Max XR Impact Wrench Kit DCF899M1
The Dewalt DCF899M1 Impact Wrench is designed with power in mind. It delivers up to 700 ft-lbs of torque and 1200 ft-lbs of breakaway torque, allowing heavy-duty tasks to be completed quickly and efficiently.
This is one of the most powerful impact wrenches on the market today. It measures 8 13/16 inches in length and weighs just over 7 pounds without a battery included. It features a 1/2 inch hog ring anvil for easy socket changes and LED lights that offer 20-second delays to increase visibility in dark or tight workspaces.
The Dewalt cordless impact wrench also comes with a 3-year limited warranty from the manufacturer, giving consumers peace of mind when investing in this tool.
Pros
- This tool can achieve speeds of up to 2,400 BPM
- An LED light offers increased visibility in dark or tight workspaces
Cons
- This is one of the heavier cordless impact wrenches on the market today
5. WORKPRO 20V Cordless Impact Wrench
The Workpro Cordless Impact Wrench is an effective and cost-efficient tool. It delivers up to 3200 RPM and can achieve a torque of 320 ft-lbs.
The unique design of the handle makes it easy for multiple users to grip the product, allowing for more comfortable use over extended periods of time. You can use the 1/2 inch universal chuck for most auto repairs and equipment maintenance.
The 2.0 Ah lithium-ion battery has a fast charger; you can fully charge it in only 1 hour. The 3 LED lights allow you to work efficiently, even in the dark.
Pros
- long battery life
- cost effective
- can achieve 320 ft-lb of torque
Cons
- only comes with one battery
What is an impact driver, and what can you use it for?
An impact driver is a powerful tool that generates high torque through the process of impacting. Rather than rotating the output shaft, hammering action spins a small metal bar at high speeds, spinning fast enough to drive external bits.
There are several reasons why an impact driver will hold an advantage over standard cordless drills. The first is its ability to overcome tight spaces. The small and narrow nature of the gun allows it access into tighter crevices and corners, where a traditional drill may not fit.
The second reason is its compact design. Impact drivers are generally lighter than other drills and do not need any bit holder; you can slip your bits directly the gun and run it with one hand. This makes them an excellent choice for overhead tasks.
The main difference between impact drivers and standard drills is that the latter uses rotational force to power screws into materials. Unlike standard drills, which spin screws in only one direction (clockwise), impact drivers can spin the screw in either direction.
One other major difference is that impact drivers don’t require you to remove your finger from the trigger to reverse the direction of rotation.
What do you use an impact driver for?
Impact drivers are a great choice for driving in long screws where the user cannot hold the screw in place. You can also use them to take apart large, bulky items such as appliances without having to get out a more heavy-duty tool.
Advantages of using an impact driver:
- Can be used in tight spaces that other drills can’t fit into
- The impact driver doesn’t require the user to remove their finger from the trigger switch to reverse direction
- No need for additional bit holders
Disadvantages of using an impact driver:
- Lack of control over how much torque is used
- Slightly more expensive than standard cordless drills due to the high speeds at which they operate.
Top Impact Drivers
1. DEWALT 20V Max Impact Driver Kit, DCF885C1
The Dewalt 20V Max impact driver measures just under 5.6 inches in length and weighs around 2.8 lbs without battery or a bit included. It is designed with an LED light to help enhance visibility when working in dark areas.
This impact driver kit also includes quick-charging batteries so that you can get back to work ASAP. The standard battery included with this purchase has a 1.5 Ah rating, and an extended battery pack with 3.0 Ah is also available for purchase separately.
Pros
- Very lightweight for its class
- LED light makes working in dark areas easier.
Cons
- Maximum torque of 117 ft-lbs is lower than other models on this list, so it’s less suitable for heavier duty tasks around the home.
2. BLACK+DECKER 20V MAX Impact Driver Kit
The Black + Decker 20V Max impact driver measures 7.8 inches in length and weighs around 3.45 lbs without battery or a bit included. It has a 1/4 inch ratcheting quick-release hex chuck for easy bit changes, as well as a belt hook to allow the user to free up their hands during longer projects.
This 20V Max impact driver kit comes with two interchangeable batteries, each with 1.5 Ah of power so that the user can work without interruption for extended periods of time. The high-performance motor has speeds up to 3000 RPM and 3900 BPM for driving screws faster than standard drills.
The Black + Decker BDCI20C is backed by a two-year limited warranty.
Pros
- Lightweight and compact design for easier usage over long periods of time.
- Great price and battery included
Cons
- Noise level is slightly higher than other models on this list.
3. DEWALT 20V MAX XR Impact Driver, DCF887B
The DCF887B Impact Driver measures just under 6 inches in length and weighs around 3 pounds with battery and bit included. The built-in LED light illuminates dark areas, which is especially helpful considering the high speeds at which this impact driver operates.
This model also features a 1/4 inch hex chuck for easy fastening and unfastening of bits with the easy-grip sleeve. The precision drive at speed 1 adds control for most applications, and there are 2 other speed settings.
Unlike many other impact drivers, this model can drive screws in both directions without needing to remove your finger from the trigger to reverse rotation direction.
Pros
- High speeds for quickly driving screws into the material
- LED light for improved work visibility.
- lightweight and compact for tight spaces.
Cons
- speed 1 with precision control doesn’t have a lot of power
4. Ryobi P235A 18V One+ Impact Driver
The Ryobi Impact Driver is a powerful addition to any cordless tool collection. This impact driver offers more power and control over long and large screws or bolts with up to 1800 in./lbs of torque and a variable speed trigger. The 18V impact driver can also deliver up to 3200 ipm to handle the most demanding applications.
For added user convenience, this Ryobi Impact Driver has a 1/4 in. hex quick-connect coupler to change bits quickly & easily. This Ryobi is compatible with Ryobi 18-Volt One+ Lithium-Ion chargers and 1.5Ah batteries, which are not included.
Pros
- Compact and powerful
- Very high torque and IPM rating, allowing for heavy-duty usage.
- 1/4 in. hex quick-connect coupler makes changing bits very easy and fast.
Cons
- Weight is slightly higher than other models on this list.
5. PORTER-CABLE 20V MAX Impact Driver Kit
The Porter-Cable PCCK647LB impact driver measures around 7 inches in length and weighs around 3.5 pounds with battery and bit included. This powerful 20-volt model features a high-performance motor that can generate up to 2700 RPM and a maximum torque rating of 1400 inch/lbs for driving large screws faster than standard drills.
The driver also features a one-handed quick-release 1/4 inch chuck, as well as a brushless motor to increase runtime by 50%. In addition, this impact driver kit comes with two batteries to ensure maximum power & run time for large projects.
Pros
- the brushless motor provides increased motor life and high torque/speed ratings for heavy-duty applications
- very lightweight, making it perfect for extended use.
Cons
- can start off too powerful if you push the trigger down too much
How to use a hand impact driver
A hand impact driver is a tool that uses kinetic energy from the body to turn objects. It is typically used when you need to be in tight spaces and want more control over your bits.
Step 1: Hold the bit in one hand and place it against the screw head to use a hand impact driver. Position yourself to comfortably pull back on the trigger with your other hand to drive the screw.
Step 2: Once the bit is lined up, slowly pull back on the trigger and move the bit into contact with the screw head.
Step 3: Continue pulling back on the trigger until you feel a slight jolt through either your hands or arm to indicate that it’s locked in position.
To remove screws, reverse these steps.
Impact Driver vs. Drill
The main difference between an impact driver and a drill is torque. Impact drivers are designed to deliver up to 3000 in-lb of torque, whereas drills do not have much power. The impact driver is specifically designed for screws that require a lot of torque, such as lag bolts used with wood framing or decking. It can be harder on your wrists to drill holes because there is no on/off switch on an impact driver. Think of an impact driver like a hammer drill, screwdriver, and power drill rolled up into one tool.
Though most drills are 12 volts, some high-end models (generally 18 volts) can act as impact drivers, too. When it comes to battery life, the higher voltage you have, the better. Lithium-ion batteries will always outperform nicad and ni-mh batteries in just about every way.
Safety Tips for:
Impact Drivers
If you have a job that requires the use of an impact driver, then you probably already know that using it can be dangerous if not handled properly. As with any other power tool, there are certain safety precautions you should always follow to keep yourself from getting hurt. Here are some…
- Always wear eye protection when operating an impact driver.
- Never use a power tool in a wet environment. Both the motor and battery can be damaged by water or moisture, so it is important to take precautions to keep your impact driver safe from these elements.
- Be aware of where you are pulling the trigger from, as well as what is behind your intended working surface.
Impact Wrench
Safety precautions for an impact wrench are similar to those for an impact driver. Because of the device’s high torque and rotational force, it is important to ensure that you are wearing proper eye protection. Do not ever use a power tool in a wet environment, as water or moisture can damage both the motor and battery.
In addition to protecting yourself from your tool, it is equally important that you protect your tool from the workpiece. It would be best to always use an impact wrench with a socket or nut to ensure that it is not damaged by anything other than what is intended. This will help prevent flaws in the surface of the screw and make it easier to remove, thus reducing friction and damage done to both your impact driver and the workpiece.
FAQ’s on Impact Wrenches and Impact Drivers
1. Can impact driver be used as an impact wrench?
Yes. As long as you are not looking for high torque for heavy-duty automotive applications, an impact driver should work instead of an impact wrench for most household jobs. However, if it specifically asks for an impact wrench, it typically needs the higher torque applications, and an impact driver might now work in those cases.
2. What is the difference between a driver and an impact wrench?
The main difference between a driver and an impact wrench is the impact wrench is designed to deliver high torque, while a driver is not. Most impact wrenches have a standard 1/2″ square drive perfect for sockets. Impact Drivers tend to have a standard 1/4″ hex drive for bits. Drivers can also fit bits to drill holes; impact wrenches cannot.
3. Can you use an impact driver to remove lug nuts?
Yes, you can use an impact driver to remove lug nuts. Some models work better than others. You want a driver of at least 18 volts and an adapter for a 1/2 inch square drive.
4. Is an impact wrench worth it?
Yes, an impact wrench is worth it. Impact wrenches deliver much more torque than drills or drivers, so, therefore, they can remove lug nuts and bolt heads that the other tools cannot handle. If you are going to be doing a lot of automotive work, it would be worth it to invest in an impact wrench.
5. What to look for when buying?
When buying an impact wrench, it is important to look for power, speed & run time. More power generally equates to more speed and run time. You also want to look at the maximum torque and breakaway torque it provides.
When buying an impact driver, it is important to look for at least 18 volts or 20V. Look for brushless motors to ensure long motor life and high torque ratings. If you are getting a cordless one, get a driver that has a fast charger and long battery life.
6. How much more torque do impact wrenches have than impact drivers?
Impact wrenches tend to deliver between 100 and 700 ft-lb of torque, while impact drivers deliver between 500 and 2500 in-lb of torque or an average of 125 ft-lb of torque.
7. What is a brushless impact driver?
A brushless impact driver is an impact driver that has a digitally controlled brushless motor. It operates more efficiently & cooler than brushed impact drivers while delivering more torque and speed.
Conclusion
The basic difference between an impact driver and an impact wrench is that the latter can produce substantially more torque, making it useful for extremely heavy-duty applications. Impact wrenches are also much better at rotationally articulating their force than impact drivers.
On the other hand, impact drivers are lighter and more portable. They are also more comfortable to use for extended periods of time, making them ideal for doing a lot of quick work with screws and other fasteners. In general, impact drivers are great for lighter-duty work around the house, while impact wrenches can get you out of a bind when it comes to changing tires or other heavy-duty repairs that require a high amount of torque.
