IVY Classic Industries is dedicated to producing a comprehensive, quality line of power tool accessories and hand tools. IVY Classic's M2 High Speed Steel Countersink Tapered Drill Bits are constructed out of hardened and tempered M2 High Speed Steel. They are ideal for wood screws, and feature a 90-degree tapered drill bit and an 82-degree countersink point angle. The Countersink Tapered Drill Bits include a 4 cutter adjustable alloy-steel counterbore with 2 set screws for depth adjustment. It also features a 1/4" Hex Power Shank for Rapid Reload (Registered Trademark) bit changes.