It can process all kinds of metals (including hardened steel) and nonmetals (such as marble, jade and bone), and the processing hardness can reach HRC70. The use is simple, convenient and reliable, which can reduce the labor intensity and improve the working environment. It can replace the small grinding wheel with handle in most work, and there is no dust pollution. The production efficiency is high, which is dozens of times higher than that with a file and nearly ten times higher than that with a small grinding wheel with a handle. The product has good processing quality and high smoothness, and can process high-precision mold cavities of shapes. Long service life, ten times higher than that of high-speed steel cutter and more than 200 times higher than that of small grinding wheel. Name:carbide rotary file set Quantity:10pcs/set Grain:double grain Main uses:Tungsten steel grinding head is widely used in machinery, aviation, automobile, ship, chemical industry, craft carving and other industrial departments, and the effect is remarkable. Model:A-type cylindrical, C-type cylindrical ball head, D-type spherical, E-type elliptical, F-type arc round head, G-type arc tip, H-type torch, L-type conical round head, M-type conical tip, N-type inverted cone, totally 10 types. Colour:Silver Material:steel Size:3x6mm Package Contents: 1 * Cutter set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.