taper chisel bit chisel rock bit mining bit air chisel bit taper chisel bitchisel rock bit mining bit air chisel bit (1)Connect Size: 19, 22, ... 6 degree, 7 degree, 11 degree etc.The chisel bit is made from grade hard alloy and special steel, generally ... within diameter of 50mm. It is widely used in metallurgy mine, geological exploration, water conservancy construction, electricity, traffic, tunnel, ...