Widly used:Diamond bur set great for grinding and carving for field stone,ceramics,glass, carbide,tile,marble,jewlry, rock etc. Application:This diamond burr very highly recommended for crafts, hobbies, home repair, jewelry,lapidary use, modeling, and so much more. Easy to use,Suit for M10 grinder. Diamond raw materials:This product uses diamond raw material particles with high hardness, which makes grinding faster, more wear-resistant, and has a longer service life. It will not drop slag or burn the surface of the workpiece. Delivery does not include the extension rod Colour:Gold Material:Diamond Size:50mm Package Contents: 1x Brazing mushroom head hole saw 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.