[Product Parameter]: Head Diameter:18mm(23/32"), Shank diameter 6mm(1/4"), only applicable to die grinder with 1/4" chuck or adjustable chuck, it is Not suitable for Dremel, Total Length:60mm(2-3/8")
[Scenarios of Use]: Apply to stone carving, jade carving, bone carving, egg decorating, glass carving. The sanding ball bit is great for larger detail jobs with your die grinder
[Target Material]: The diamond drill bits for stone used for engraving, trimming, grinding stone, ceramic, glass, alloy, tungsten carbide, etc
[ Long-Lasting & Sharp]: Diamond embedded in the surface of the round drill bit ,Grit 150 (Medium), which guarantees the durable of the product as well as its sharpness.