40mm 8mm Shaft Electroplated Diamond Conical Countersink Drill Bit

Nickel Electroplated Diamond Donut Burs Point Bits series of tapered grinding heads are forged from high-quality 45-gauge steel. The surface is made of high-strength synthetic diamonds, which are wear-resistant and highly efficient. This product is suitable for boring high hardness metals, such as hard alloys, quenching or nitriding tools, alloy steel knives, mold deburring, shaping, chamfering, polishing, and fixtures. It can also be used for hardness. Processing of high and brittle non-metallic materials such as glass, ceramics, jewellery and jade. Shank: Straight