Fully heat treated alloy steel with satin finish, three sockets and an extension bar. Torque wrench calibrated individually & supplied with test certificate. Reversible ratchet for faster precise measurements in storage case. Adjustable torque & lock setting with dual lb.ft & Nm readings. Accurate to ± 4% with setting range 14-203Nm. Socket sizes: 17, 19 and 21mm. Extension: 125mm.