... Our firm produce the corollary equipments which match with the products from well-known manufacturers, such as ... constructions etc.Our company produces advanced drilling tools with the top-grade manufacturing equipments. The mission ... T51Face Shape---Plate, Concave, Convex.Bit Shank & Coupling sleeve---R22,R25,R28,R32,R38,T38,T45, ... /H22, Length: 0.5M to 6.0M.Thread Rod---R25,R28,R32,R38,T38,T45,T51. ...