KIRK - Model MD Series Type T - Medium Duty - Key Transfer Block - Brochure

The Type T interlock is an assembly of two or more lock cylinders in a single housing. Type T interlocks are designed to retain one or more keys (called held keys) while the remaining (initiating) key(s) are removed. This allows an exchange of keys in an interlock sequence. All initiating keys must be inserted into the Type T interlock before the held keys can be removed. Once a held key is removed, the initiating keys are trapped in the interlock.