The KLC is a multiple key bolt interlock designed for mechanically interlocking switchgear, valves or machinery with mechanical linkage.

The unit comprises heavy-duty lock body, multiple lock centres and a locking bolt with claw. The KLC can be used in a double key condition, for use at the beginning and end of an interlocking sequence, or in an exchange key condition, as part of a continuing interlocking sequence or where a personal key is required.

Double key condition: In the normal 'locked off' operating condition, the claw is extended and both keys are free. To withdraw the claw, both keys must be inserted and turned. With the claw withdrawn the keys remain trapped.