Stanley STMT73372-8B 1/2 Inch Drive Hex Bit Socket 5 mm

Stanley's STMT73372-8B hex bit socket pairs a 1/2-inch square drive with a 5 mm hexagonal bit, so an Allen-head screw can be driven with a ratchet, extension bar or T-handle. The bit is S2 steel, and Stanley says the alloy steel socket gives long-lasting durability. Stanley builds it to ISO 1173, ISO 2380-1, ISO 2351-1, ISO 1174-1 and ISO 691 and marks it as exceeding the ANSI standard. Bit sizes in this range run from 4 mm to 19 mm, 11 in all.