The Grainger 170G06 is a 6-inch bench vise with a 50,000 psi ductile iron body and a hardened steel screw. It has 4-1/2 inch jaw width and opens to a maximum of 6 inches. The vise has 360 degree swivel capability with a lock down swivel base. It can securely hold your workpieces in place while you saw, sand, drill or perform other operations. This is a heavy-duty vise ideal for metalworking shops.