Collet wrench with a socket for torque wrenches for clamping nuts (ER) according to DIN 6499. Application: For tightening and loosening the clamping nut. Design: For NC lathes, controlled tightening of the clamping nut with a 1/2-inch square drive torque wrench with ball catch groove. Made of special steel, hardened and galvanized. Advantage: Prevention of spindle damage through controlled tightening during tool changes in the machine. Note: The setting value of the torque wrench depends on the dimension S. The operating manual of your torque wrench contains the necessary information and calculation formulas. Suitable torque wrenches can be found under item number 52246300.