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What is the difference between the F51 and F54 entrance functions?

April 26, 2017difference entrance f54 functions

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What is the difference between the F51 and F54 entrance functions?

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A. The only difference between the F51 and F54 is that when locked, the inner knob on the F54 will not turn. The net effect is that you can’t lock yourself out, since you can’t get door open if the door is locked.