Material: Tungsten steel, shank diameter: 6mmDrill head size: 10mm Convenient control, using simple, safe and reliable, reduce labor intensity, improve the environment of work Usage: Processing all kinds of metal (including all kinds of hardened steel) and non-metal (such as marble, jade, bone). High Quality: High efficiency, high quality finish, long life, good economic returns. Easy to use, safe and reliable, can reduce labor intensity. Design: Mechanical parts chamfering, rounding and grooving. Double room is cross lines, not easy to block the lines, more suitable for the purposeRelatively low density material. Product description Size:5pcs 50 -60mm Rotary Burr Set Feature: The process of various metal and non-metal carvings. Ideal for processing all kinds of metal (including all kinds of hardened steel) and non-metal ( like marble, jade bone), machining hardness reach HRA≥85. Easy to work on the high precision of different shapes of mold cavity, have good machine quality and high