Proven Industries Model 400XL Puck-Lock Set – 3-Pack, Made in USA, Black

Overview

Protect your enclosed trailer and belongings with the Proven Industries Model 400XL puck-lock set. This 3-pack blends rugged build with smart design, offering a practical layer of protection for trailer doors while you’re on the road or parked for the day. The locks are built to withstand daily use and resists weather with a focus on reliability.

Built for real-world conditions, the body is crafted from aircraft-grade 6061 aluminum, delivering a balance of strength and lighter weight compared to traditional steel options. A hidden, fully shielded shackle keeps the hardware tucked away from potential prying tools, helping to reduce exposed risk on trailer doors in busy parking lots or remote locations.

Smart design and convenience

The puck locks feature a unique key design intended to deter casual lock picking and key duplication. Each lock comes with two keys, and the three locks in the set share a keyed-alike arrangement for straightforward access across doors or multiple trailers. This makes routine checks and swaps simple, without juggling different keys.

Fit, dimensions, and installation

The back opening is designed to accommodate swivel hasps commonly used on enclosed trailer doors. The back opening measures 1 3/4 in long by 1 3/4 in wide by 7/8 in high, with a depth of 1 1/4 in, creating clear clearance for typical hardware while keeping a slim door profile.

What you get and manufacturing quality

• Three puck locks in a single pack, ready to secure multiple doors or trailers
• Two keys per lock, all keyed alike for convenient, consistent access
• Made in the USA, reflecting domestic craftsmanship and quality control

These locks are designed as a practical security accessory for trailer owners, fleet managers, or anyone seeking an easy-to-maintain option for daily use. They offer a credible, non-guaranteed layer of protection through durable materials, shielded hardware, and a thoughtful key system.