Squire SHCB75 Stronghold Re-Codable Padlock 5-WheelThe Squire Stronghold Re Codeable Padlock has a unique patented pull button, re codable combination mechanism. The internal mechanism has also been treated for optimum durability in harsh outdoor environments. With hardened steel shackles ensuring high cutting resistance and a solid brass lock body with hardened internal parts. The SHCB65 is a 4 wheel padlock and the SHCB75 is a 5 wheel padlock. Encased in plastic with large solid wheels.