Proven Industries Model 400XL Puck-Lock Set – Made in The USA, Pack of 3 (Blue)

Overview

Secure your trailer doors with the Proven Industries Model 400XL Puck-Lock Set. This blue, three-pack blends rugged build quality with practical design, proudly made in The USA. Designed for heavy-duty use on enclosed trailers, the set offers reliable protection with a focus on usability and long-term durability.

What makes these puck locks stand out

• Aircraft-grade 6061 aluminum body delivers strength and excellent corrosion resistance for tough, outdoor environments.
• Hidden, fully shielded shackle protects against bolt cutters and prying tools while remaining easy to operate.
• Unique key design helps reduce the risk of unauthorized key duplication, with two keys per lock and all keys keyed alike for convenience.
• Back opening is sized to accommodate swivels on enclosed trailer doors (shackle opening: 1 3/4" L x 1 3/4" W; depth: 1 1/4").
• Made in The USA from concept to fabrication, underscoring a commitment to quality control and accountability.

Real-world use and practical benefits

• Three-lock pack is ideal for securing multiple doors on a single trailer, offering coordinated protection across entry points.
• The blue finish adds visibility and helps you identify your locks quickly in storage or dim lighting.
• Solid construction provides a sturdy feel and smooth operation, supporting routine security checks without added friction.

In everyday use, the 400XL Puck-Lock set pairs tough materials with a thoughtful keying approach. The result is a reliable, easy-to-maintain security option for trailers and cargo doors. While no security measure guarantees absolute protection, these puck locks are designed to be a practical, dependable choice for keeping doors secured during transit and in storage.