Lost reset tools can be replaced through a local hardware store or locksmith.
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Turn the Masterlock 176 lock over and set all four dials to “0."
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Press the shackle down and pull the lock open.
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Fit the reset tool into the hole in the side of the lock, and turn the reset tool a quarter turn in either direction. Leave the key in place for now.
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Turn the dials to the desired four-digit combination.
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Turn the reset tool to its original position and remove the reset tool from the lock.
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Close the shackle to set the combination. Scramble the dials to hide the combination.