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. 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 various 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. describe: Name: cemented carbide rotary file main application: 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. (1) Finishing various metal mold cavities, such as processing shoe molds and so on. (2) Craft carving of various metals and nonmetals, such as mold carving and trimming of craft gifts. (3) Clean the flash, burr and weld of casting, forging and welding parts, such as machine casting plants, shipyards and automobile factories. (4) Chamfering and grooving of various mechanical parts, cleaning pipes, and finishing the inner hole surface of mechanical parts, such as machinery factories and repair shops. (5) Smoothing of impeller runner, such as automobile engine factory. pay attention to: Tungsten steel grinding head: it is mainly used on pneumatic or electric driving tools, and the rotating speed is generally 6000-50000 rpm. When in use, the tool should be clamped correctly, and the cutting should be reverse milling to avoid reciprocating cutting, and chips should be prevented from flying when working. Material: Tungsten steel colour: silver Package Contents: 8 x Carbide rotary file 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.