Ask the Experts | Ask the Key Wizard | Difference Between Master K81 and K81M Key Blank


What is the difference between a Master K81 and a K81M Key Blank?



The K81 is used on non-master keyed locks. The K81M is used on #81 and #82 master keyed padlocks, and #1710 and #1714 master keyed locker locks. It is also used on Master Lock’s Pro Series locks using the 5-pin W81KM cylinder option.

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