... rock drill,jack hammer.drill bit,DTH hammer,DTH bit.Looking forword to receive your inquiry. Specification DTH Bit Bit DiameterButtons ... HolePart No.mminGuage FrontAngleMatched:CIR80,CIR90,QCIV-90 DTH Hammer803 3/20"6*124*1240°3DSL- ... B181255"6*167*1440°2DSL-B19Matched:CIR150,CIR170 DTH Hammer1506"8*1611*1445°3DSL-B201756 57/ ... 64"15*169*1445°3DSL-B21Matched:DHD340A DTH Hammer1054 9/64"7*146*1340°2DSL- ...