Extra capacity allows use of a smaller size wrench to handle bigger jobs, especially in confined spaces. Forged heat-treated alloy steel for maximum strength and light weight. High polish chrome finish. Precision-machined jaws are individually chosen and assembled by hand for smooth operation. Heat-treated for long life. Knurl turns smoothly for easy operation. Rail is ground for precision fit. Contoured handles for comfortable use. Chrome-plated for rust resistance.