What is an Impact Driver and Do I Need One?

An impact driver is a type of cordless drill driver, but instead of a standard 13mm chuck, it features a 1/4” hex bit holder which grips small screwdriver bits.

They're all about hi-torque, coupled with high levels of impact. A typical impact driver will output higher levels of torque than even the top-of-the-range combi drill. They use rotational force like an ordinary drill but have these extra advantages along with this.

Because of the torque available to you, you’ll typically be able to quickly drive long, wide, large screws into the toughest of materials. Another key feature and benefit to look for when choosing a cordless impact driver is the headlength.

As you’ll be using your impact driver in tight, awkward spaces at times, the shorter the headlength the better. More affordable ones will have one speed, and that’s fine. However, for more finesse, speed and torque control, 2 or more speeds is preferable.

So, again, if this matters to you look for an impact driver that has at least 2 speed/torque settings.

Watch our short video guide cover the topic of impact drivers:

With each rotation of the bit holder the motor applies impacts coupled with high levels of torque.

And all of this comes from a cordless tool that usually has a very compact head length, making it perfect for driving screws in tight corners or hard to access places.

Do I Need An Impact Driver?

We have an extensive guide on everything you need to know about cordless drills that you read to find out which drill or driver you need and why.

We asked Eric from Bosch to explain the differences between impact drivers, combi-drills (sometimes called impact drills) and impact wrenches. Watch our exclusive guide: