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