1The universal sleeve self-adjusts to fit various fasteners. Quick and easy to mount and remove screws, hooks, lag screws, and bolt heads etc. 2All parts are constructed of chrome vanadium steel, heat treated for increased hardness, strong and durable. 3The socket adapter allows the universal socket to work with power drill, efficiently improving work efficiency. 4Mirror polished sleeve housing, anti-corrosion, rustproof and beautiful. 5Applied to automotive industry, home repair, manufacturing industry, construction and so on.