While they both look nearly identical to a standard drill, they serve completely different purposes.

What Is a Hammer Drill?

What Is an Impact Driver?

Hammer Drill vs. Impact Driver comparison

The Spruce / Kelsey Hansen

Tip

When shopping for impact drivers, consider buying a drill/driver set instead to save money.

However, the key differences between the two tools make each tool better suited for different jobs.

Hammer drills and impact drivers are intended for use with specifictypes of drill bits.

Hammer drill

The Spruce / Kelsey Hansen

Always check for bit compatibility to get the most out of your hammer drill or impact driver.

The power deliverance of each tool is intended for specific purposes.

An impact driver shouldn’t be used to drill into concrete.

electric drill into the wall

Marinos Karafyllidis / Getty Images

Masonry bits are designed to work with the hammering motion of a hammer drill.

Additionally, masonry bits don’t have compatible shanks for with impact driver’s quick-change chuck.

Impact Driver

The Spruce / Kelsey Hansen