Features 1、There is a adjusting screw on the chamfering device, which can control the drilling depth, also takes the chamfering function into account while punching, convenient and efficient 2、The material is made of high‑speed steel, which has high hardness, wear resistance and good cutting edge retention 3、4‑flute adjustable countersunk drill bit with 82‑degree chamfer, cutting and cleaning chips faster, realizing fast and smooth countersinking 4、The tip is designed with a lengthened length, which can drill holes quickly and cleanly and ensure a close fit with the screw. Easier to locate and drill 5、The size of the drill bit is 11/64, with a 1/4 hex shank, which includes tapered drill bits Specification Item Type: Wood Countersink Drill Bit Set Material: Drill Bit: High-speed steel, Chamfering Device: High-carbon steel Shank Type: 1/4 Hex handle Specification: 11/64 Package List 7 x Drill Bit 1 x Chamfering Device 1 x Wrench