Pro 50 Adjustable Mushroom Head Torque Wrench 3/8in Drive 10-50Nm - Norbar 15005, The Norbar Professional Adjustable 'Mushroom' Head Torque Wrenches are fitted with NorbarsIndustrialstyle of ratchet. Using the principle ofoffset 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 (themushroomhead) 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. TheIndustrialratchet is specifically designed for torque wrench application and provides users with the perfect combination of strength, versatility and ease of use. Factory calibrated to ±3% and the new mechanism ensures that the accuracy is retained for longer. They have a new ergonomic handle with a high pro