As well as the Slip­ping or Break­ing Mech­a­nism, that reduces or elim­i­nates the risk of incor­rect tight­en­ing, the tool also sends a sig­nal each time the wrench achieves its pre-set torque val­ue. This makes these tools suit­able for pro­duc­tion line con­trol or to pro­vide a count­ing func­tion, as they can be con­nect­ed to the cus­tomers pro­duc­tion systems.