... drilling tools, eccentric drilling tools, standardized API system casings, bit shanks and casing tubes which are fit for hydraulic drilling ... Copco, Sandvik, Ingersoll-Rand etc. The equipments are widely used in earthwork projects, minerals exploiting, well-digging projects and foundation ... ,R32,R38,T38,T45,T51Face Shape---Plate, Concave, Convex.Bit Shank & Coupling sleeve---R22,R25,R28,R32,R38,T38, ...