The S51 is a tubular entrance lock with a key outside and a turn button on the inside.
Function: Unlocked by key from outside when outside lever is locked by turn-button in inside lever. Inside le...
Classroom by Storeroom Lock - Outside lever locked or unlocked by key - Inside lever is fixed and key retracts latch - Caution: These locks on residences and any door in any structure which is use...
Apartment
Corridor Lock function is defined as a lock where the latch bolt operated by
lever from either side, except when outside lever is made inoperative by a stop
or mechanical means other than...
Corridor Lock - Locked or unlocked by key. When locked by key it can only be unlocked by key - Inside Push-button locks outside lever. Turning lever or closing door releases button. Inside lever is...
Classroom Lock with Vandlgard - Outside lever locked or unlocked by key. Vandlgard allows outside spindle to disengage from latch when locked. Inside lever is always unlocked and is always free for...