Cleanable nut drivers with rounded corners to reduce the wearing on nut heads, increasing part life. Moveable magnetic nut seat means no wasted time in trying to clean the nut driver. For use with impact drivers and cordless drills. DeWalt Impact Rated Cleanable Nut Driver 10mm in Black. The 'Extra Grip' ribs grip the screw and reduce slipping. Shockproof Material: steel, Weight: 0.0220462262 pounds.