... Diameter:89mm,thickness:9mm 2.Use:mining,water well,oil drilling. 3.Available in all sizes. 4.Long service life ... .168.mmWall Thickness:9-45mmMaterail:alloy steelUse:water well drilling,mining,oil drilling,building,machinery,trafficMethod:cold drawn,hot rolled or hot ... -4 .ST52.4USE:DTH bits DTH hammer,DTH drill rods ODEX,SYMMTRIX1.top hammer drilling tools inculding thread button bit ,copling,taper ...