Stanley STMT73377-8B 1/2 Inch Drive Hex Bit Socket 10 mm

Stanley's STMT73377-8B is a 1/2-inch drive hex bit socket with a 10 mm hex bit, for driving Allen-head fasteners with a ratchet or other square drive tool. It is made for manual use from alloy steel, and the S2 steel bit is hardened to HRC 60 plus or minus 2, giving 20% more torque than chrome vanadium, Stanley says. Stanley cites ISO 1173, 2380-1, 2351-1, 1174-1 and 691 standards and marks the range as exceeding the ANSI standard. It is one of 11 sizes, 4 mm to 19 mm.