Master Lock’s iconic Marksman commercial demonstrated superior strength, performance and durability – the foundation of all Master Lock products. Aired from 1974 - 1983 during the big game, this commercial continues to be well-known and remembered. #MasterLock #ForEverythingWorthProtecting | Master Lock

We put the classic Master Lock 5400 series combo box under the microscope and decoded it step-by-step. No force, no destruction—just technique. This video breaks down how the internal wheels behave, what to feel for, and how a simple decoding method can bypass most common combination lock boxes. If you’re learning lockpicking, physical security, or just want to understand how these mechanisms really work, this one’s for you. ⚠️ For educational and security testing only. Always practice on locks