What Size Bits Does an Impact Driver Use?

An impact driver is a wide range of used power tools for both drilling holes and driving screws. When using an impact driver we should know its collet size, and bit size in order to select the bits. So let’s see, what size of the bit will use an impact driver.

Normally, an impact driver can use 1/4” (6.35mm) bits for its quick-change chuck (collet). Although the torque is varied, all types of available impact drivers use the same size impact driver bits.

When we consider the impact driver bit sizes, we should know many additional things. So let’s see, all in detail step by step!

What is the Size of Impact Driver Bits?

We can consider all sizes of impact driver bits are 1/4”(6.35mm) by size. This is common for all types of available brands of impact drivers. So finally, we can agree that impact driver bits are universal.

Although impact drivers can work with different torques, their collet size and bit size will not change. It is common for all brands. So, we can use the same impact driver bit for any tool. 

What is the Shape of the Impact Driver Bit?

The shape of the impact drive bit has a special hex shape that helps to resist higher torque. And also, the special shape of the drill bits used in impact drivers makes it possible to tighten or secure the safety screws or nuts under high torque. But what is commonly used in drills is the circular shape. Therefore, it cannot be operated under high torque.

These hex shank bits are coated. This Ti-N coating on impact drill bits extends their lifespan. Excess heat dissipated due to heavy loading during drilling operations.

This special shape reduces the pressure on the hand of the drill bit user and reduces the problems that may arise during the installation of the drill bit.

What is the Collet of the Impact Driver?


The function of the chuck is named as collet in the impact driver. It can be named as a quick change chuck also. We can change driver bits easily when we use a quick-change chuck. When you use this you should push back and drop the driver bit inside the collet. When it moves front, it will automatically tight the driver bit.

Using this you can reduce the impact bit changing the time. The most available collet sizes are 1/2″ and 3/8″. Impact drivers are mostly used for drywall jobs. Hence collets has designed to quickly change the bits with another.

Can I use Impact Bits in a Regular Drill?

Simply put, the answer is yes. The hex bits are used for the impact driver. The collet was designed for the hex shape. The regular drill like the SDS drill, wants circular shape drill bits. The chuck was designed for circular-shaped drill bits and rounded-ended drill bits. Therefore, hex-shaped impact driver bits will be used with regular drills. But it is not as efficient as an impact driver

In fact, due to the robustness of the impact drill bits and their ability to be used even under high torque, these beers are even more secure when used with a normal drill. Also keep in mind that impact drill bits can be used in regular drills but regular drill bits are more dangerous than those used in impact driver

Tom Mackency

Tom Mackency

Hi, I am Tom Mackency. It has been 10 years that I have been working as a professional woodworker since 2013. I am really enjoying my carrier by creating many kinds of projects in my workshop. But mostly I like for home improvement projects. Home improvement and DIY projects are the most interesting things for me. More than that, the coolest things are power tools. Those are very precious and efficient than a decade ago. So I try to introduce so many things about power tools, woodworking, DIY projects, home improvement and many more interesting topics here.

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