Forged from Chrome Vanadium Steel (CR-V), hardened, tempered, chrome plated, and polished with a light satin finish for corrosion protection, Ring and jaw offset at 15°, Thinner head for hard to reach fasteners, For heavy-duty application, Increased torque capacity, Exceeds international ASME & DIN standards, Specifications Imperial Sizes: 1/4in, 5/16in, 3/8in, 7/16in, 1/2in, 9/16in, 5/8in, 11/16in, 3/4in, 13/16in, 7/8in, 1in, Metric Sizes: 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 17mm, 19mm, 22mm,