Features 1、6 pieces countersink drill bits of different sizes from 6mm to 19mm, meeting your various needs. 2、Standard 1/4in hex shank, suitable for many drills, such as hand drills, rechargeable drills, etc. 3、Suitable for hole opening and chamfering of boards with low hardness such as wood and plastic boards. 4、Five-blade grooved design for better chip removal, high-carbon steel drill bit, not easy to be dull. 5、The plated surface is rustproof, thus the drill is more beautiful and has high surface hardness. Specification Item Type: Countersink Drill Bit Product Material: High Speed Steel Application: Suitable for opening and chamfering of boards with low hardness such as wood and plastic boards. Specifications: Approx. 6mm / 0.2in, 8mm / 0.3in, 9mm / 0.4in, 12mm / 0.5in, 16mm / 0.6in, 19mm / 0.7in Shank Type: 1/4in Hex Handle Package List 6 x Countersink Drill Bit