This Wilton® Verti-Lock Machine Vise has a ductile alloy body with flame-hardened bed to provide solid work support, accuracy and longevity. The fixed jaw is rated at 85,000 PSI and the annealed, surface ground sliding jaw at 70,000 PSI. Spindle is fully enclosed to protect it from from milling elements. Available in 5in. or 8in. jaw length. Limited lifetime warranty.