Changing Combination On A Sargent & Greenleaf 8500 Manipulation Proof Safe Lock

Designed for the most demanding, high-security applications and based on S&G’s original MP Manipulation Proof® locks, 8500 series Group 1 and 1R mechanical combination locks provide superior durability and long-lasting performance.
With three combination wheels, our Group 1 combination locks offer over 1 million possible combinations to deter combination hacking attempt.

[@warrensteel9954]

Thanks. I've been wanting to reprogram mine for some time now.😄

[@CertifiedSafesIreland]

Happy to help!

[@jaxrules2892]

People have found ways to manipulate these so-called “manipulation-proof” locks.

[@CertifiedSafesIreland]

Got a link?