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This tutorial shows the steps to programme the combination for a S4MK padlock. Users can choose from 10,000 possible variations because of the 4 rollers that have 10 digits each.
Like the R4MK, the S4MK is nice and robust and it’s intended to be used in sports and educational centres. Because it has a 4.3 mm thick shackle, it can be used on almost any locker.
