• Upon reaching the set torque the marker is designed to stamp on the bolt and work.
• Because the stamped mark is put on the side of the bolt and the workpiece, it can not only prevent missed tightening but also detect the loosening of bolts.
• The marker is designed to stamp only when the torque wrench operates upon reaching the set torque.
• Marking stays on by the use of quick-dry ink.
• One refill of ink is capable of approximately 3,000 times stamping.
• Marker is ink cartridge type.
• The only hand force required for tightening a bolt and marking the bolt simultaneously.
• Applicable for international use including the EU region.
• Compliant with ISO 6789 Type II Class B calibration procedures.

A mark is made on the tightened cap screw and an adjacent location on your work. This lets you check for subsequent loosening. A marking torque wrench for tightening cap screws, which prevents human tightening errors.