From The Anvil Black Monkeytail Slimline Lever Espag. Lock Set - LH

Lock Set - LH. A ‘Slim’ espagnolette version of the traditional 'Monkeytail' handle, which is designed with an extra long backplate to be used with all multi point locks. These handles are very secure as they are bolt fixed from the inside of the door and have no visible fixings on the exterior.

eBay