The Siemens 8GK9561-0KK01 is a lock system for ALPHA 630 DIN cabinets with tall doors, incorporating a recessed swing handle for a flush closure. It provides secure keyed access on floor-standing and wall-mounted distribution cabinets while retaining the enclosure's protection rating. Typical applications include low-voltage distribution boards and control cabinets where restricted access is required to energised equipment.