... tools, eccentric drilling tools, standardized API system casings, bit shanks and casing tubes which are fit for hydraulic drilling equipments ... in earthwork projects, minerals exploiting, well-digging projects and foundation constructions etc.Our company produces advanced drilling tools ... ,R38,T38,T45,T51Down-The-Hole Tools1) DTH BIT---65MM to 254mm.2) DTH Hammer---76MM /90MM /110MM 3) Face ShapeConvex ...