1. Material: metal 2. Made of tool steel forging, durable and long service life 3. Overall heat treatment, high hardness, high torque and high hardness tap 4. Card slot heat treatment, strong card position and strong torque support 5. Hard coarse teeth, stronger clamping force, durable and not easy to wear 6. Size: 10mm-12mm 66.7x20.6 cm, 14mm-18mm 76x21.5 cm 7. Weight: 10mm-12mm 79g; 14mm-18mm 128g
