Main use: Tungsten steel grinding is widely used in industrial sectors such as machinery, aviation, automobile, shipbuilding, chemical engineering and process engraving. Finishing metal mold cavities, such as processing shoe molds and so on. Various metal and non-metal process engraving, such as mold engraving, trimming of craft gifts. Clean the flash, burrs and welds of castings, forgings and weldments, such as machine-casting plants, shipyards, automobile factories, etc. Chamfering and groove processing of mechanical parts, cleaning of pipes, finishing of the inner hole of mechanical parts, such as machinery factories, repair shops, etc. Finishing of the impeller runner, such as an automobile engine factory. Product Name: Carbide Rotary File Weight: about 95g set Colour: silver Material: Steel size: 3x3mm Package Contents: 20 x Double-grain Mixed Model Rotary File Only the above package content, other products are not included. Note: Light and different displays may cause the color