... With Auto-blocking bolt 4,Fire door locks Mortise lock / Night latch bolt lock 5572ZF / 6072ZZFHSK LOCKS & HARDWARES Euro ... Follower8×8mm 9×9mmBackset55mm,( 55mm,60mm)Distance72mm Forend typeSquare head (Round or Square)thickness3 mmwidth24mm(20, 22, 23, 24 ) ... etc. ,such as latch bolt locks, dead bolt locks, night latch locks, bathroom locks and emergency escape function locks, passage ...