"Triple lock" gets used a lot in security door quotes, but not everyone explains what it actually means. Here's the short version.
What it is
A triple lock is a door latch that engages in three places at once when you turn the key or throw the deadbolt: a hook or claw at the top of the door, the main latch in the middle, and a hook or pin at the bottom. Instead of one point holding the door shut, you've got three, spread across the full height of the frame.
Why it matters
A single-point lock gives an attacker one spot to focus force on — usually near the handle. Spread that load across three points top to bottom and the door resists prying and jemmying far better, because the frame is holding the door shut at multiple heights, not just one.
What's standard on our doors
- Ultra Stainless doors — triple lock hardware is included in the price, hinged or sliding.
If you're comparing quotes from different suppliers, it's worth asking directly whether triple lock is included or an extra — it's not always itemised clearly, and it makes a real difference to how the door performs once it's installed.