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The MASTER LOCK CO 6271D is a shackleless padlock built in the hockey puck style for maximum resistance to cutting, prying, and forced entry. The die cast body measures 2.875 inches across and houses a 6-pin re-keyable cylinder, giving security professionals the ability to rekey the lock on-site without replacing the entire unit. The shackleless design eliminates the exposed shackle that is the most common attack point on traditional padlocks, making it well suited for applications where physical security cannot be compromised. Installers in freight, logistics, and automotive security rely on this lock type for door hasps, trailer doors, and access panels.
The 6271D is designed for high-security commercial and industrial applications including freight line use, automotive facility access control, and secure storage enclosures. The hockey puck form factor fits flush against door surfaces, reducing the attack surface and making bolt cutters and pry bars far less effective. It is appropriate for both indoor and outdoor installations where a robust mechanical lock is required as a standalone or supplemental security measure.
Designed as a high-security replacement or upgrade padlock for standard hasp-mount applications in freight, logistics, and automotive environments where a shackleless puck-style lock is required.
Installation is performed by a qualified locksmith or security technician. Ensure the hasp or door lock housing is rated to accept a puck-style shackleless lock before mounting. Verify the door or panel is in the fully closed position before engaging the lock. Re-keying should be performed per the manufacturer cylinder rekeying procedure using the appropriate rekey kit.
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