Master Lock 6321 Rekeyable Padlock 2.125in inventory supply

High-security padlock for sheds and fencing

The Master Lock 6321 is a rekeyable padlock built to secure sheds, fencing or doors against theft. Its boron-alloy shackle sits inside a solid-iron shroud that resists bolt cutters. A dual-deadbolt locking mechanism adds pry resistance. The cylinder or shackle can be replaced when keys are lost or access needs change.

Replaces fixed-cylinder padlocks when key control

This model upgrades from standard padlocks that must be discarded after a key compromise. The rekeyable design makes the jump worthwhile for sites where multiple locks share a key system or where cylinders are rotated on a schedule. It is not for buyers who need a non-rekeyable, single-use lock or who require an electronic access audit trail.

Mechanical lock limits access management

The padlock relies entirely on a physical cylinder and key; there is no electronic credential, remote revocation or access log. Lost keys require a cylinder swap rather than a software reset. The 2.125in wide body fits standard hasps but may not suit narrow latch points. Environments needing time-based access or centralised credential control will need a different platform.