Specifications:  Product Name: Countersunk Head Drill;  Size: 6.3/8.3/10.4/12.4/16.5/20.5mm countersunk drill +3mm twist drill;  Suitable For: Type C according to DIN 335;  Color: Silver + charcoal black;  Material: HSS6542;  Weight: 164g;  Design: Straight shank 90° 3 blade, oil-coated protective oil on the surface to prevent rust;  Quantity:  6x Countersunk drill;  1x Twist drill.     Features:  1. Suitable for workpieces with hardness below 65HRC, such as stainless steel, aluminum plate, carbon steel, thin iron plate, insulation board, PVC board, wood board, etc;  2. One-piece design: It can make the debris generated by machining more convenient in the process of chamfering, and will not delay the work efficiency due to tool blockage;  3. The blade can be ground: the more convenient maintenance method allows the tool to be ground without unloading;  4 A simple one-step process: the automatic through-hole chamfering knife can quickly trim and chamfer the two sides of the hole in a few seconds;  5. Excellent material: It can process all kinds of hard metal, and the improved blade makes the tool life double.     Package Included:  6× Countersunk drill  1× Twist drill