Vermont American 16515 Screw Pilot Countersink Set, Steel, 4-Piece

Used for smooth and fast cuts when countersinking and counter boring in wood, plastic and composition board applications. Fits all corded and cordless screwdrivers, drills and screwguns. 1/4 in hex shank, replaceable drill bit. Fits #6, #8, #10 and #12 wood screws.