Wera's Click-Torque Adjustable Torque Wrench is a torque wrench allowing for the precise application of torque to square or hex drive heads. It features a range of features for ease of use and convenience.Audible and tactile torque indicatorRange of measuring rangesRange of head typesWera's Click-Torque Adjustable Torque Wrenches are available in a range of head sizes and torque. All feature a range of clever features designed for ease of use. The 45 tooth ratchet mechanism is reversible and easy to set. There is a audible and tactile click when the desired torque is reached. The Click-Torque range is precise to +/- 3 or 4%.