... :degree 4"46, 6, 7, 11, 12 —MAXDRILL Tapered Chisel BitTapered Chisel Bit is generally matched with the light-duty rock drill ... construction, electricity, traffic, tunnel, quarry stone project etc(1) Type: chisel bits(2) Size: 19mm, 22mm, 25mm(3) Diameter: 26-100mm ... : degree 4°46′,6°, 7°, 11°, 12°.(5) Package: in wooden case or in carton. (6) Productivity: 50000pcs/ monthOur tapered bits ...