2022年5月31日 admin 087 | 5572 CLASSROOM MORTISE LOCK Technical Specifications 1.center distance: 72mm ,backset: 55mm 2. case: galvanize steel SECC,thickness: 1.5mm 3.latch : sus304 4.safety latch: sus304 5.firend: sus304 , 6.follower 8*8mm 7. compliance with EN12209