Screw Boss Bit Finder Driver, Outer Sleeve Slides Over The Screw & Keeps The Bit In The Screw Recess, Holds The Screw In Correct Starting Position Without Wobbling Or Disengaging From The Bit, For Use With #10 Screws, For Use With Elec Tric Or Cordless Screwdrivers, & Drills, Carded