This 3-piece torque wrench set is constructed from strong chrome vanadium steel for enhanced durability. The set includes a 1/2" square drive with a setting lock and reverse lever, along with a 1/2" to 3/8" adaptor and a 10cm 1/2" drive extension bar. The torque range is 42-210 Nm (4.3-21.4 m/kg). The set comes supplied in a sturdy, blow-moulded plastic storage case for safe handling and mobility.