Torque-limiting Card Loks are fitted using an ordinary hex key. A patented engagement mechanism automatically ensures precise tightening torque and eliminates the need for a torque wrench. In addition, errors such as under-tightening or over-tightening are prevented. It also means that a module does not need to be taken to the workshop if maintenance or repair is required, but instead can be replaced or calibrated on site. As a result, system down times are reduced considerably. Schroff Calmark Card Loks can be removed and refitted at any time.
Torque-limiting Card Loks are available in both imperial and metric formats. In addition, various surface coatings are available, including anodised black and nickel-plated. To ensure maximum safety, each individual Card Lok is subjected to an extensive testing program, including being tested to the MIL 810 specification.