... sale drill bits ISO9001 &14001 high quality and the lower price OEM or produce according to your request best service hot sale drill ... : T38, T45, T51, ST58, T60 GT 60.2. Main button bits diameters: R32-45MM, R32-51, R32-64, R32-76, T38 ... .Package: in wooden case or in carton.Tapered button bits are mainly used in mining,coaling,metaling and etc hot sale drill bits