For use with our Espagnolette 92mm 'unsprung' Lever Handles and Euro Cylinder and allows your door to be locked from inside or out. Suitable for securing flush French timber doors and offers the best type of security available. The master lock securely engages into slave mechanism & automatically deadlocks a slave unit once operated. No need for false (dummy) mullion and a non-handed lock mechanism with reversible sash bolt to minimize stock requirements. Door sizes: Min. 1830mm - Max. 2115mm / Door size with extension bit (20791): 2600mm. Sold as a kit which includes: main lock, slave lock, top & bottom bolts (x4), dead lock keeps (x4) (26x26mm) and door latch strike plate (144x12mm). A Espagnolette handle set and Euro Cylinder must be purchased separately (see above link). Supplied with all necessary fixings.