Specifications Bit diameter Includes Tapered Rock Drilling Tools and Threaded Rock Drilling Tools 32mm, 34mm, 36mm, 40mm 50mm, 55mm, 60mm, 64mm, 76mm, 89mm, 102mm, 115mm A lot of kind type for Button Bits. In addtion to, we can product the products according to the custome rs. Usefulness: Rock drilling tools and mining tools for use in quarrying, Mining, Tunnelling, Construction and Civil.