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

745K views · 2.5K reactions | ¿Candado cerrado y sin llave? Mira este truco sorprendente  Lock closed and without a key? Look at this amazing trick  #cuidado #tips #herramientas #hack | Cerrajero Key Master | Facebook