Wera Tools - 7400 series Kraftform Torque screwdrivers, with factory pre-set value (0.3-3.0 Nm) and Rapidaptor quick-release chuck, handle size 105 mmWera torque screwdrivers. With a factory pre set torque value set to the smallest scale value. For all applications, where the same constant torque and repeat accuracy are required. The torque can be changed with an extra tool within the measuring range (re calibration kit can be ordered with the code number 05137001001). Afterwards you can check the set value using an off the shelf torque tester. Unlimited loosening torque for slackening stuck