Set of metal cylinder lock and mounting hardware. Attach it to the glass doors of a cupboard to prevent children from opening it and dropping dishes. Made of metal, it boasts high safety and durability. There are two keys to prevent the lock from being released if a key is lost. Perfect for use with pet cages! Especially for reptile pets, there is a risk of escape through gaps if the cage is not securely closed. This is what came with the cage when I bought it. I have been using the ones I already had, so I haven't used this one and have kept it. Please purchase only if you don't mind that it has been stored at home. Thank you.