The room door mortise lock from Stabilit is suitable for use in DIN left-hinged room doors with a rebate. The lock has a distance standard of 72 mm, which describes the distance between the profile cylinder hole and the 8 mm plastic nut. The backset, which describes the distance between the cuff and the hole, is 55 mm. The round, 20 mm wide cuff is made of metal. A latch and a single-turn plastic latch ensure that the door closes securely with the Stabilit room door mortise lock.