DTH bits 1)well performanced 2)highly efficienctive DTH bitsWe are the manufacture of rock drill,jack hammer.drill bit,DTH hammer,DTH bit.Looking forword to receive your inquiry.Specification DTH Bit Bit DiameterButtons(mm)Water HolePart No.mminGuage FrontAngleMatched:CIR80,CIR90,QCIV-90 DTH Hammer803 3/20"6*124*1240°3DSL-B11903 35/64"6*144*1240°3DSL-B12903 35/64"6*144*1240°3DSL-B13903 35/64"6* ...