##From S&G official docs:##
Observing the following rules will help you select a new combination which is secure and which will optimize the design strengths of your Sargent & Greenleaf lock.
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Do not select numbers in an ascending or descending sequence.
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Leave at least a ten number margin between adjacent numbers of the combination.
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Do not use a number between 95 and 99 or between 0 and 20 for the third (or last) number of the combination. This can cause a condition which will inhibit the mechanism from locking correctly.
##Instructional Video## https://www.youtube.com/watch?v=mjmLG8tNfWQ