We were asked to supply and install a 5 lever deadlock to a front door. A British Standard deadlock fitted to the door for the customer.
We fitted a British Standard Union Strongbolt 5 lever deadlock as they are better quality than the standard ERA deadlocks. ERA is also British Standards approved, but you have to run a file over the keys to enable them to even go in to the key hole sometimes!
You don’t get this issue with the Union Strongbolt lock, they’re a bit more expensive than ERA, but worth it every time in our opinion.
If you need a lock replacing or fitting to a door from scratch, please get in touch.