quick off function, easy to operate: just press the in front of the head, you can easily install or remove the sleeve With the reverse function easily swings around the head pull, supports to switch left to flip Ratchet-angle wheel for tight spaces, quick-turn lever manually, helping to improve work efficiency Made of high quality chrome steel, high hardness, and practical & portable, Weight: 2.51547440942 Pounds, Manufacturer: Aisuoka