This lock is always locked unless opened with a key.

A deadbolt or deadlock is a locking mechanism that cannot be moved to the open position except by rotating the key.  A deadbolt can make a door more resistant to entry without the correct key.

The passage/hall/closet function is ideal for doors in hallways, closets, and other rooms where a key is not necessary. The lock is freely operational from both sides of the door at all times.

High security locks are locks that provide increased resistance to unauthorized entry. We recommend MEDECO high security locks and keys. MEDECO provides Key control and keys that cannot be duplicated on traditional key machines at local retailers.

A lock that requires a pocket—the mortise—to be cut into the door or piece of furniture into which the lock is to be fitted. In most parts of the world, mortise locks are found on older buildings.