sash window

If you're looking to improve the security of your home without compromising aesthetics choose door handles with sash lock. They're used with mortice latches or sash lock and can be combined with a night latch to provide additional locking for internal doors.

<img width="432" src="https://www.repairmywindowsanddoors.co.uk/wp-content/uploads/2018/10/Replacement-Wind