HART’s (MM) 11pc ½” Deep Socket Set provide better reach and access to get to hard-to-reach fasteners. Chrome plated for maximum rust resistance, and 12 pt. socket design to prevent round-off. In addition, these sockets are forged from high-grade Chrome Vanadium Steel (CrV) to withstand the rigors of heavy-duty use and large size markings make finding the right size easier. Standard set includes (11) ½” sockets: 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 21 mm.