https://ferco.ca/en/product-categoriies/single-double-hung/sash-locks-keepers/
Sash Locks & Keepers - Ferco
sash lockskeepersferco
https://www.prismaproducts.co.uk/shop/5-lever-bs3621-insurance-rated-sash-locks.html
5 Lever BS3621 Insurance Rated Sash Locks | Ironmongery
5 Lever BS3621 Insurance Rated Sash Locks
sash locksleverinsuranceratedironmongery