The insert lock 12312 is suitable for double-leaf connecting or corridor doors in commercial buildings, such as administrative buildings, nursing homes, or secondary access doors in schools and hotels. For daytime or nighttime operation, the external push button can be engaged or disengaged by turning the cylinder with a key in the opening direction until it stops. During daytime operation, the door can be accessed from both sides via the push button. The panic function B allows for exit from the panic side at any time.

• For double-leaf doors in combination with the 12100 strike plate
• Panic function B with inward/outward adjustable panic side
• Dampened, left/right adjustable comfort latch
• Play-free push button mounting due to the two-part continuous clamping nut
• Linear push button actuation and holding moment through new spring design
• Central lock case
• 1-turn bolt (throw 20 mm)

No knob cylinders are permitted, except for locking cylinders with a retaining reset.