This Shower Valve Socket is constructed of steel and comes in a zinc plated finish. These tools resist corrosion and are the ideal tool for removing tub and shower stems when normal socket is too thick to fit in the tight space. Zinc plated to resist corrosion ensures the tool will last a long time and serve its purpose many times over. Each socket includes torque holes for bar handle, or screwdriver shaft use, for tightening or loosening purposes.