... standardized API system casings, bit shanks and casing tubes which are fit for hydraulic drilling equipments. Our ... ,T38,T45,T51Face Shape---Plate, Concave, Convex.Bit Shank & Coupling sleeve---R22,R25,R28,R32, ... T38,T45,T51 Down-The-Hole Tools1) DTH BIT---65MM to 254mm.2) DTH Hammer---76MM ... 1033.5bar~2067bar)Plate ---Suitable for had rock ( more than 2067bar) Drill RodSteel Drill Rod---H19/H22, Length: ...