DEWALT DW2730 8 Piece Quick Change Drill and Drive Set DEWALT drill/driver bit set, 5/16 in shank, 8 pieces, black oxide Provides secure connections to components and lines This product is manufactured in United States Quick and easy changes between drilling and driving Black oxide split-point drill bits start on contact Quick change mechanism for easy one-step loading Easy push forward for one-handed release Contoured finger grip for easy ergonomic use; 5/16-inch Shank for Added Durability