Double-headed multi-functional self-locking wrench. Time-saving, efficient, convenient, industrial quality. The plate body is polished and plated as a whole, which is beautiful and not easy to rust. It is suitable for dismantling bolts of various specifications. It is widely used in mechanical engineering, machine repair, car repair and other related maintenance industries. Specification: Material: Stainless chrome-vanadium steel Product length: 160/145mm Product thickness: 4mm Range of use: 8-22mm/3-17mm Product weight: 70g/35g Packing list: 1 * dual-head multi-function key self-locking