Proven Industries Puck Lock Set 400XL — 3-Pack, Hidden Shackle, Keyed Alike, 6061 Aluminum, Made in USA

Overview

The Proven Industries Puck Lock Set 400XL arrives as a compact, rugged solution designed to secure trailer doors, storage enclosures, and jobsite access points. Its low-profile hidden shackle sits flush with the lock body, offering a clean look while standing up to prying attempts on the road or at a worksite. This 3-pack is built around a unified key system that simplifies daily use without sacrificing control.

As you walk up to a trailer in the early morning chill or after a long shift in dusty conditions, you’ll notice the solid feel of the aluminum body and the smooth action of the keyway. The set’s design emphasizes practical security and straightforward operation, so you can focus on the task at hand rather than wrestling with tangled keys or exposed hardware.

Why it stands up to daily use

• Hidden, shielded shackles reduce exposed hardware, helping deter tampering during loading, transport, or storage.
• Pick-resistant cylinders add a layer of protection, supporting dependable operation in varying environments.

Durable by design

• 6061 aircraft-grade aluminum bodies deliver strength while resisting corrosion in wet, salty, or dusty conditions.
• Corrosion-resistant materials are chosen to help preserve finish and performance over time for both commercial and personal use.

Convenience you can count on

• Keyed-alike access across the set reduces key clutter and speeds up lockups, with each lock including 2 keys.
• Unique keyways help prevent unauthorized duplication while keeping legitimate users on a predictable schedule.

Hassle-free installation and practical fit

• Generous rear opening seats over common door hardware, while the hidden-shackle design nests for a low-profile installation.
• The design helps minimize tool leverage and snag risks during loading and unloading, supporting smoother daily operations.

Made in the USA

Engineered by a family-owned team with a focus on safeguarding trailers and cargo. The lock set combines careful fabrication with high-quality materials to support dependable performance in demanding environments.