Choose these knobs if you want individual knobs or groups of knobs that open with their own key, but also open with a master key. Once the outside knob is locked with the button on the inside knob, turn the inside knob to release the lock or unlock it with a key from the outside. These are also known as entrance knobs. They are UL Listed for three-hour fire doors. Two Schlage C style keys are included; master keys are sold separately.

Select a knob with the correct backset distance (the distance from the door’s edge to the center of the knob's mounting hole) for your door. Latch bolt projection is the length the latch bolt extends from the door's edge.

Choose these knobs if you need several knobs that open with the same key. Once the outside knob is locked with the button on the inside knob, turn the inside knob to release the lock or unlock it with a key from the outside. These are also known as entrance knobs. They are UL Listed for three-hour fire doors.

Select a knob with the correct backset distance (the distance from the door’s edge to the center of the knob's mounting hole) for your door. Latch bolt projection is the length the latch bolt extends from the door's edge.

Choose these knobs if you want individual knobs or groups of knobs that open with their own key, but also open with a master key. The outside knob is always locked and has to be unlocked with a key while the inside knob can always open the door. These are also known as storeroom knobs. They are UL Listed for three-hour fire doors. Two Schlage C style keys are included; master keys are sold separately.

Select a knob with the correct backset distance (the distance from the door’s edge to the center of the knob's mounting hole) for your door. Latch bolt projection is the length the latch bolt extends from the door's edge.

Lock the outside knob with the button on the inside knob. Turn the inside knob to release the lock or release it from the outside with a slotted screwdriver. These are also known as privacy knobs.

Select a knob with the correct backset distance (the distance from the door’s edge to the center of the knob's mounting hole) for your door. Latch bolt projection is the length the latch bolt extends from the door's edge.