You grab an impact driver to run structural screws, deck screws, or any high-torque fastening and your cheap driver bits snap, round off the recess, or chew up the screw head. Every stalled bit means stopping the job to dig another one out of the collated strip or go back to the truck. 10-piece impact driver bit assorted set. Impact-rated bits are hardened to handle the sudden, high-torque hammer action of an impact driver — they do not round, crack, or cam out the way standard bits do under that kind of load. The assorted selection covers the most common #2 Phillips, square, and torx sizes you run into on framing, deck, and structural jobs. Standard on framing crews and general contractors across northeast Nebraska and northwest Iowa — the bit set that covers the most common sizes without Stocked at Crofton Lumber and Akron Lumber.