Norbar 15007 Model 400 3/4 Drive Industrial Mushroom Ratchet 80-400 N-m/60-300 lbf-ft These Professional Torque Wrenches are fitted with Norbar's 'Industrial' style of ratchet. Using the principle of 'offset pawls', these ratchets feature a robust tooth pattern and a narrow engagement angle, meaning that the wrench is easy to use in tight spaces. The square drive features a finger grip on the top ('mushroom' head) that assists with running down the nut until resistance is met. The square drive can also be removed and replaced in the opposite direction so the wrench can give torque control in both the clockwise and anti-clockwise directions. The 'Industrial' ratchet is specifically designed for torque wrench application and provides users with the perfect combination of strength, versatility and ease of use. Featuring a TimeStrip which gives a visual indication the tool is due for re-calibration, a unique feature on a torque wrench. Features: Factory calibrated to +/-3% and our new mec