The Maco MACH II shootbolt espagnolette locking system.

Gearbox mechanism only.

The mushrooms move in opposite directions. This locking action that was developed by MACO ensures that when the window is forced one of the mushroom bolts engages further into the striker plate.

Available in 2 back set sizes of either 20mm or 22mm.

and in short or long version - see image below

Information from the manufacturer

MACO shootbolt espagnolettes mechanisms for casement windows incorporate all the benefits of safety and security expected of modern window technology in
today’s environment. MACO shootbolt espagnolettes have been vigorously tested for security and performance above the requirements of industry standards.
For performance they have been endurance tested to 40,000 operations and salt spray tested in accordance with BS EN 1670, silver look class 4 and tricoat class 5.