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

Overview

The Proven Industries Puck Lock Set 400XL arrives as a blue, three‑pack designed to secure enclosed trailers, cargo doors, and jobsite access points. Crafted from solid aircraft‑grade 6061 aluminum, these locks balance a compact footprint with rugged, lasting performance. The set offers a practical, professional-grade solution built to perform through daily use in demanding environments.

Smart security you can feel

Each lock features a hidden, fully shielded shackle that stays out of sight and away from prying hands. The cylinders are designed to resist tampering, while the unique keyway helps deter unauthorized key duplication. Together, this creates a reliable barrier that works quietly in the background of your routine operations.

• Hidden shackle design deters bolt cutters and prying attempts.
• Pick‑resistant cylinders add a subtle layer of protection against tampering.
• Keyed‑alike access across the 3‑pack reduces key clutter and simplifies daily use.
• Each lock includes 2 keys for ready deployment.

Durability and environmental resilience

The 6061 aluminum bodies are built to withstand harsh sites, with corrosion‑resistant materials that perform in wet, salty, or dusty environments. This combination supports long‑term reliability for commercial fleets and personal setups alike.

• Robust aluminum construction handles everyday wear and weather exposure.
• Corrosion resistance helps preserve performance over time.
• Low‑profile, nestable shackle design minimizes snag risks during loading and unloading.
• Made in the USA with careful fabrication standards for consistent quality.

Ease of use and installation

The set is designed to simplify routine lockups across trailers and doors. A generously sized rear opening accommodates common swivel hasps, while the hidden shackle and tidy profile help keep installations clean and secure. The keyed‑alike system streamlines access without compromising security.

• Hasp compatibility with common door hardware for straightforward installation.
• Low‑profile shackle and clean lines reduce leverage opportunities during loading.
• Unique keyway helps prevent unauthorized duplication while keeping access simple.

Engineered in the USA and backed by family‑owned expertise, the 400XL 3‑pack pairs practical security with reliable materials for everyday use. While no lock can guarantee absolute protection, this set offers a robust, thoughtfully designed option for securing trailers and cargo in a variety of conditions.