Norbar Pro 300 Adjustable Mushroom Head Torque Wrench 1/2in Drive 60-300NmThe Norbar Professional Adjustable 'Mushroom' Head Torque Wrenches are fitted with Norbars 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 (the mushroom head) that assists with running down the nut until resistance is met. The square drive can also be