Multi-function self-tightening double-head wrench. Time-saving, efficient, practical, industrial-grade. The plate body is plated as a whole, which is beautiful and not easy to rust. Suitable for disassembling screws of various specifications. It is widely used in mechanical engineering, machine repair, automobile repair and other related maintenance industries. Color: Black Material: Steel Package Contents: 1 x Thickness 3.5mm Black Wrench Use for 8-17mm/3-8mm 1 x Thickness 3.5mm Black Wrench Use for 14-22mm/8-13mm Wrench 1 x Thickness 5mm Black Wrench Use for 3-8mm/8-17mm Wrench 1 x (Short Style) Thickness 5mm Black wrench to use for 14-22mm/8-13mm 1 x 6mm thick black wrench to use for 14-22mm/8-13mm Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.