1. Chrome vanadium steel forging, overall heat treatment, high hardness, high torque, good toughness and durability 2. Square hole interface, the edge of the hole adopts the arc inner angle design to increase the torque 3. The square head has a ball spring, which is safer during operation and is not easy to fall off 4. The steering structure is connected, which can rotate 360 degrees, change the angle of force, and save time and effort in narrow spaces 5. Material: chrome vanadium steel 6. Surface treatment: chrome plating 7. Specifications: 1/4inch, 3/8inch, 1/2inch 8. Interface: 6/10/12.5mm 9. Length: 1/4 of about 41mm, 3/8 of about 57mm, 1/2 of about 76mm 10. Weight: 1/4 of about 25g/piece, 3/8 of about 70g/piece, 1/2 of about 145g/piece
