A socket wrench is a tool used to provide grip and mechanical advantage in applying torque to turn objects, usually rotary fasteners, such as nuts and bolts to tighten or loosen them. Socket wrench is used in all major industries, garages, and homes to tighten or loosen the bolts. This is a set of 9 wrenches with different sizes which is useful for different sizes of bolts. With their anti-slip and anti-corrosion features, these socket wrenches will last long with no compromise in performance.