Window & Secondary Locks
Add a layer of security to doors and windows with a door lock, window lock or bolt. The range includes a door bolt lock in brass, chrome and aluminium, tower bolt lock designs, window bolts, locking casement fasteners, security bolts with keys and packs of bolts, from Securit, Era, Yale and Minder.
A brass door lock or brass lock adds a traditional look, while a chrome finish suits modern fittings. Brass bolt lock and brass window locks are common on period homes, and widths such as 1 inch and lengths from 63mm to 150mm are listed so you can match an existing fixing. Window and door locks that need a key add extra protection when you are out, but remember that every occupant should be able to open windows in an emergency.
Check the frame material, the gap between sash and frame and the position of the screws before ordering. Security window and security door locks work best as a secondary measure alongside a good main lock.
Filters
123 products
How to choose window and secondary locks
Choose by window or door type and how it opens.
| Type | Best for | Things to know |
|---|---|---|
| Casement window lock | Hinged timber or metal windows | Key-locking types add security |
| Sash window lock | Sliding sash windows | Fit sash stops to allow safe ventilation |
| Window restrictor | Limiting how far windows open | Useful child safety on upper floors |
| Door chain or door guard | Checking visitors before fully opening | Fix into solid timber with long screws |
| Patio door lock | Sliding patio doors | Anti-lift locks stop doors being lifted out |
Window & Secondary Locks: frequently asked questions
What is a secondary lock?
A secondary lock is an extra lock or bolt added to a door or window on top of the main lock to improve security.
How do I fit a tower bolt?
Mark the position on the door and frame, drill pilot holes, screw the bolt and keep, and check that it slides easily.
Do window locks need a key?
Some do, and some are a simple bolt or fastener. Keep keys where everyone can reach them quickly in an emergency.
Which size door bolt do I need?
Measure the door thickness and choose a bolt length and width that suits the space. Larger bolts feel more secure.
Are brass window locks as secure as chrome?
Security depends on the design and the fixings rather than the finish. Choose the finish that matches your fittings.
Buying in bulk or for your business?
Landlords, trades and facilities teams can ask us for a quote on larger quantities.