Drill bits: Cross Bits, DTH Bits, Chisel Bits 1 Drill bits: fast drilling ... compressor, hydraulic drilling rig, civil motor, fire proof motor, electric wire and cable, rock drill, down the hole tools, rubber hose ... through strictly inspection, manufacturing high quality products. Drill Bits Including Cross Bits, DTH Bits, Chisel BitsTechnical Data:Dia.(mm) Tip Size ...