Impact Pro black oxide drill bits. Made form premium M2 steel to withstand heat and ware under rigorous drilling applications. Single piece, fully ground construction lasts 6X longer than two piece constructed drill bits. 1/4 quick change shank fits all quick change adapters and cordless impact tools. Features. Black Oxide Impact Pro Drill Bit 0.20 in.Specifications. Dimension 1 x 4 x 7 in.. Cube 28. Weight 0.03 lbs