Weight: 4.0 Material: Steel Quantity per pack: 6.0 Warranty: 2.0 Designed for professionals and DIY enthusiasts. Contains 6 common shapes: domed cylinder, rounded shaft, concave arc with ball tip, cone, cylinder, inverted cone. Double chamber is more suitable for materials with relatively low density. Universal - 6mm shaft, compatible with all electric and cordless drills, air tools, grinders and other rotary tools. Durable and reliable - The machining hardness reaches up to HRA85. Can replace a small grinding wheel for most jobs without causing dust. Machining of all types of metals [including all types of hardened steel) and non-metallic materials [such as marble, bone, jade). Use on drills, presses, lathes, manual or electric or pneumatic devices with flexible shaft. Can replace a small grinding wheel for most jobs without causing dust. Safe and reliable, can reduce labor intensity. Features: Material: Steel Shank Size: 6mm Round Shank Function: Rotary Burrs, good for your wood carving, drilling and engraving, professional tools. Can also grind marble, jade and other non-metallic materials wheel, there is no dust pollution. Grinding efficiency is up to 10 times better than manual files and handle grinding wheels. The workmanship is high quality and flexible and can be made into all kinds of high precision shapes. Safe, reliable and convenient to use. Long service life: more than 200 times the wheel. Areas of use: Clean burrs and burrs in casting, forging, welding, etc. mechanical drilling surfaces. Safety tips: The cutting direction should move smoothly from right to left, do not cut back and forth like a wheel, be careful not to use too much force [the pressure usually does not exceed 4 kg). Note: 1. The product is very sharp, please keep it away from children. 2. The size is measured manually and there may be an error of 0-3mm, which is normal. 3. Due to the differences between different monitors, the picture may not reflect the actual color of the project. The package contains: 6 pieces of rotary cutter ladace < /p>