Designed for providing high tightening also in confined area, with safety protection against overloads: output square drive (models TN14, TN27 and TN35) and pin (models TN40, TN60 and TN95) are calibrated to break if overloaded the 20%, in order to protect the inside mechanisms. One square drive or one pin, according to the model, is included. Tighten force are transmitted easily with the maximum accuracy. Gears are manufactured with high precision and high quality steel. Accuracy ± 5%.