Specifications: 6 PCS chamfer cutters are available in six different diameters of 6.3mm/8.3mm/10.4mm/12.4mm/16.5mm/20.5mm. Different diameters can be used for drilling. Sharp anti-rustThis countersink is made of HSS high speed steel, high hardness and not easy to rust. Its cutting edge is hardened and ground, so it is sharper and has a longer service life. NoteIf you use a countersunk drill on a hand drill, use a twist drill bit to drill the hole, then use a countersunk drill so as to avoid any risk of sloshing caused by drilling. More processing materials: 6 PCS walnut countersinks can chamfer the edges of the holes. Tapered cutters can process different materials such as hardwood and cork, aluminum foil, plastic, PVC and light iron. This chamfer cutter is suitable for all kinds of machine tools Chamfering design: The chamfer cutter adopts the appropriate tilt angle design, anti-rust and anti-corrosion, beautiful and delicate, giving the strength and rigidity of the sharp edge milling cutter, the strong increase of the milling cutter, the processing properties of cutting and milling. Scope of application: This kit of countersunk head drilling is suitable for home DIY and daily use. It can be drilled easily and efficiently, not only without burrs, but also without scratches. Material: high speed steel Color: silver Quantity delivered: 6 pieces