The Saracen Dead lock Mechanisms may be fitted internally or can be assembled prior to dropping into a eurogroove. An ideal security solution for most double glazing casement windows.

Gearbox Mechanism Only (shootbolts can be bought separately).

Deadlock mechanism systems consist of shootbolts and a unique central gearbox with a deadlock. The shootbolts fit into the the gearbox mechanism with a bayonet fitting using a twist-and click motion. Shootbolt rods are available in four lengths and are simple to connect to the gearbox mechanism with easy to adjust screw thread action to suit any tolerance variations.

Gear box mechanisms available in backsets of 20mm or 22mm

and with latch size of 9.5mm or 11.5mm

The deadbolt that moves in and out  of  the middle of the gearbox mechanism size can be either 9.5mm or 11.5mm. You can find the deadbolt size on the end of the latch. See picture