Two questions, twenty seconds

Will it fit my door?

This tool tells you which locks cannot go on your door, and by how many millimetres. That part is just arithmetic and we can prove it. It will not tell you a lock definitely fits, because that depends on the fixing kit for your door.

1 · Your door 2 · The card test 3 · Result

How does your door open?

This decides more than anything else, because sliding doors need a different mechanism inside the lock.

It swingsA normal hinged door. Front doors, back doors, most internal doors. It slidesA ranchslider or a sliding door that runs along a track. A pair that meet in the middleFrench doors or double doors. It foldsA bifold that concertinas back on itself.

Smart locks for aluminium joinery, if your door is a ranchslider, a french door, or anything with a narrow stile.