Feature: Double-headed self-tightening multifunctional 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. Suitable for dismantling screws of various specifications. It is widely used in mechanical engineering, machine repair, auto repair and other related maintenance industries. Specification: Material: Chrome vanadium steel Product length: 265mm Product thickness: 7mm Use range: 8-22mm Product weight: 0.25kg 1*8-22mm double-head self-tightening multifunctional wrench