The Master Lock No. 6421 Weather Tough® Padlock is engineered to withstand the most extreme outdoor conditions while providing exceptional security for industrial and commercial applications. Its heavy-duty steel body resists physical attacks, while the hardened boron alloy shackle offers superior cut resistance.

This padlock features an exclusive Weather Tough® cover that protects against water, ice, dirt, and grime, making it ideal for demanding outdoor environments. Compatible with Small Format Interchangeable Cores (SFIC), it offers versatile rekeying options to align with your door lock systems.