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 13mm in Black. Uncomplicated and fast cleaning of the socket wrench. Reduced wear and longer service life of the screw heads by Form fit. Special design suitable for almost any screw heads. No screws loss by permanent magnet. Suitable for use in impact screwdrivers. The 'Extra Grip' ribs grip the screw and reduce slipping. Shockproof Material: steel, Weight: 0.0881849048 pounds.