GU Secury A2 automatic gearboxes were fitted to one of the first automatic locking multipoints. They are available in 35mm, 45mm, and 55mm backsets.

GU multipoint lock gearboxes feature a latch and deadbolt and measure 185mm high (excluding the fixing lugs) by the backset + 18mm wide.

Always allow 2mm when measuring your backset and the faceplate is still attached to the gearbox.

We stock a range of associated products for GU Secury A2 gearboxes, including multipoint door locks, keeps, spindles, handles and accessories.

To lock the door

1. On closing the door, the latch and locking points are automatically engaged as the triggers on the door connect with the keeps on the frame.

2. Turn the key to deadlock the mechanism.

To unlock the door

1. Turn the key to unlock the mechanism.

2. If you have a lever, push the lever down to retract the locking points. Alternatively, a further quarter turn of the key will retract the latch to open the door.