An impact driver is a power tool that uses a hammering motion to drive screws or bolts into hard materials. It is more powerful than a traditional drill driver, and it can be used to drive screws into concrete, metal, or wood. Impact drivers are often used for construction or automotive work.
Impact drivers are typically more expensive than drill drivers, but they offer several advantages. They are more powerful, they can drive screws into harder materials, and they are less likely to strip screws. Impact drivers also have a longer lifespan than drill drivers.