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“ deadlatch no holdback ”

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Resolution: Double cylinder deadlatch - Deadlatch retracted by key either side. No holdback.:

What grade is the B250 and is this product UL listed?

Resolution: The B250 is Grade 2 but has no UL listing due to the holdback rose.:

Resolution: Holdback lock - Latch bolt operated by lever from either side except when outside lever is locked from outside by key. Latch bolt can be locked in a retracted position by key. When outside lever is...:

B250

Resolution: Single cylinder deadlatch - Deadlatch retracted by key outside or thumbturn inside. Holdback feature standard.:

What is a lock function?

Resolution: 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...:

Explain the holdback feature for the B250.

Resolution: The B250 Night Latch is a single cylinder deadlocking latchbolt where the latch is retracted by a key from the outside or by the inside thumbturn. Rotating the thumbturn and activating the hol...: