Description:Designed with the unique tooth shape, this wrench that has two heads can provide you with firm clamping, and since it has different sizes of its two heads, it has wider range of use.Adopting the choice material and electroplating treatment, this wrench has good rust resistance, abrasion resistance, high hardness that reaches HRC60.This wrench is mainly made of chrome vanadium steel, which is sturdy and anti-corrosion.Its length is 270mm, its width is 28mm and its thickness is 8mm.It is suitable for mechanical engineering, machine repair, auto repair and so on.Item Name: Self-tightening WrenchMaterial: Chrome Vanadium SteelSize Details: Length: 270mm/10.63" (Approx.)Width: 28mm/1.1" (Approx.)Thickness: 8mm/0.31" (Approx.)Clamping Range: 8-22mm/0.31"-0.87" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Wrench