Features: It is made of emery and silicon carbide, which not shed sand/chamfer and polish more sharply/wear-resisting. M10 thread is easy to install, and the clamping is more stable//less slippery. The bevel relieves the chamfering pressure, which is convenient for bevel enlargement, grinding and polishing of existing holes. Suitable for reaming and chamfering of marble, quartz stone, ceramic tile, etc. Often installed in model 100 angle grinder/hand drill. describe: Name: Chamfering bit Diameter: 38mm Thread: M10 Applicable model: model 100 angle grinder Quantity: 1pc Material: Corundum + silicon carbide colour: gold Package Contents: 1 x Chamfering bit 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.