Mortice lock ES BB RS 55/72/20, face plate 20 x 235 mm. In accordance with DIN 18251-1, class 1, plastic latch and deadbolt. Lock case closed on all sides, galvanised. Mortice lock for light room doors. Only the latch is operated when the door is closed. Latch bolt throw 10 mm. Locking excludes the deadbolt. Bolt exclusion 10 mm. Also suitable for use with flush doors.