P117 Ventilation Window Lock White Finish Pack of 1 from Buckfast Tools
Sash Window Restrictor With Key Locking from HandleStore.com
Guide to Sash Window locks - The House Detectives
Prestige Glass and Aluminium - LOCKLATCH: Leave any Window and Door Open but Locked. For Security, Safe Ventilation and Pet Access. The LockLatch Window Restrictor is a lockable latch made from high-grade
Yale P117 Ventilation Window Lock White x 2 - Saunderson Security
Yale White Metal Window Ventilation lock, Pack of 2 | DIY at B&Q
Window Ventilation Restrictor Fits Outward & Inward Windows and Tilt & Turn ABS | eBay