Using air operation, strong and durable, easy maintenance, split type tools, pneumatic tension (STTR) with pneumatic bite tripping device (STP) using a single button design, convenient save Labour BOSCH motors, good stability Applicable industry: steel pipe, steel coil, wire rod, cut a round or irregular plane etc. Operating mode: full pneumatic tension device, and pneumatic bite buckle, cooperate to use. (single bite button)