All our locks will come standard with an adjustable backset at no extra charge, so there is usually no need to measure your door or specify that dimension when you place your order.
Watch this short video if you would like to see how to change the backset from 2-3/8" to 2-3/4" or vice versa. The video shows this being done on a Lockey adjustable deadbolt, but the process is similar for a Lockey adjustable latchbolt as well as for other manufacturers.
If you would like to determine what the backset measurement is for your door or gate, just measure distance shown by the red arrows in the diagram below.
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NOTE: The diagram above shows an deadbolt, but the same measurement applies to a latchbolt.