1Dimensions: Total length 5263mm/2.052.48in, shank diameter 6mm/0.24in, outer diameter of the tip 10mm /0.39in, tip blade length 920mm/0.350.79in. 2Durable Construction: Using highquality heattreated tungsten carbide, the hardness can reach HRC70, durable to use, very suitable for fine detail work. 3Multipurpose Tool: These cutting burr set is widely used in metal products, woodworking, model engineering, wood carving, jewelry making, welding, chamfering, casting, deburring, grinding, etc. 4Easy to Use: Generally can be used with handheld electric or pneumatic tools (also for machine tools, the speed of electric/pneumatic tools is usually around 600050000 rpm. 5Long Service Life: Ten times higher than the durability of highspeed steel cutters, and more than 200 times higher than the durability of small grinding wheels. Item Type: Die Grinder Bit Material: Tungsten carbideGranularity: 1000 (mesh) Outer Diameter: Approx. 10mm/0.39in Shank Diameter: Approx. 6mm/0.24in Purpose: Polishing and grinding Application: Tungsten steel grinding head has a wide range of uses, and is used in machinery, aviation, automobile, building, chemical industry, craft carving and other industrial sectors 5 x GrinderBit 5 xStorage Box