Double-secured locking and access control. PROTEC²CLIQ single cylinder for profile doors mortice lock cases. Outer hardened steel cylinder with blind inner ring. Adjustable during installation to match different door thicknesses. Used e.g. with double cylinder lock cases. Product is tested and certified according to the most demanding standards SFS 5970, SFS 7020, FA security grade 1. Patented PROTEC²(T) key system.