1) With lacunaris banding and worm-type hosing, it is especially for large diameter range and could be used reiteratively 2) Any risk of damage to the hose is eliminated by tilted and smooth edge 3) Has heavy torque and more materials could be used 4) Various band width available 5) Materials: a) W1: zinc plated steel b) W2: band and hosing: stainless steel; screw: zinc plated c) W4: stainless steel
