Unlock the outside knob with a combination; the inside knob is always unlocked.

For frequently used doors, these knobs last twice as long as standard key- and button-locking door knobs.

Open these knobs with both a shared master key and key unique to that door, or use the button on the inside.

These knobs can always be opened from the inside, while the locks on the outside each open with a different key.

For frequently used doors, these knobs last twice as long as standard key-locking door knobs.

These knobs open with a master key and their own keys. The inside knob opens the door whether it is locked or unlocked.

Each of these knobs opens with its own key. The outside handle is always locked, but you can open the door from inside.

Unlock these knobs with a master key and a key unique to that door. They are always locked from the outside, but doors can be opened from the inside knob.

These knobs are always locked from the outside. Unlock multiple knobs with the same key, or turn the inside knob to open.

In addition to lasting twice as long as button-locking door knobs, these are made entirely of corrosion-resistant materials to stand up to washdown and marine environments.

Also known as passage knobs, these knobs do not lock.