---
product_id: 227442244
title: "Proven Industries Puck Lock Set, Model 400XL, 2-Pack, Hidden Shackle, Keyed Alike, 6061 Solid Aluminum, Shackle Opening 1 3/4 x 1 3/4 x 7/8 in, Depth 1 1/4 in, Made in USA, Blue"
brand: "proven industries"
price: "€ 238.13"
currency: EUR
in_stock: true
reviews_count: 8
category: "Proven Industries"
url: https://www.desertcart.sk/products/227442244-proven-industries-puck-lock-set-model-400xl-2-pack-hidden
store_origin: SK
region: Slovakia
---

# Unique anti-copy key system Aircraft-grade 6061 aluminum Pick & cut resistant design Proven Industries Puck Lock Set, Model 400XL, 2-Pack, Hidden Shackle, Keyed Alike, 6061 Solid Aluminum, Shackle Opening 1 3/4 x 1 3/4 x 7/8 in, Depth 1 1/4 in, Made in USA, Blue

**Brand:** proven industries
**Price:** € 238.13
**Availability:** ✅ In Stock

## Summary

> 🔐 Lock in peace of mind with Proven Industries’ toughest puck locks!

## Quick Answers

- **What is this?** Proven Industries Puck Lock Set, Model 400XL, 2-Pack, Hidden Shackle, Keyed Alike, 6061 Solid Aluminum, Shackle Opening 1 3/4 x 1 3/4 x 7/8 in, Depth 1 1/4 in, Made in USA, Blue by proven industries
- **How much does it cost?** € 238.13 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/227442244-proven-industries-puck-lock-set-model-400xl-2-pack-hidden)

## Best For

- proven industries enthusiasts

## Why This Product

- Trusted proven industries brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Tailored Fit:** Generous shackle dimensions (1 3/4" x 1 3/4" x 7/8") perfectly accommodate swivel hasps on enclosed trailer doors.
- • **Proudly American:** Designed, researched, and manufactured in the USA—quality and security you can stand behind.
- • **Unbreakable Armor:** Crafted from aircraft-grade 6061 aluminum for unmatched durability and corrosion resistance.
- • **Invisible Fortress:** Hidden, fully-shielded shackles protect against bolt cutters and prying tools—security you can’t see but can trust.
- • **Keyed for Convenience:** All keys are keyed alike, eliminating fumbling and streamlining your access with two keys per lock.

## Overview

The Proven Industries Model 400XL Puck-Lock Set is a premium, heavy-duty security solution made from aircraft-grade aluminum, featuring a hidden shackle design that resists picking and cutting. Each lock includes a unique anti-copy key system and fits swivel hasps on enclosed trailer doors. Manufactured in the USA, this pack of two blue puck locks offers professional-grade protection for trailers and valuables.

## Description

Product description Watch how easy it is to install the Model 400XL Puck 400XL installation video on trailer

Review: Good price for a well made lock! - Super easy to install and is compatibilite. Very well made and fits securely. A must have for security and at a great value.
Review: Good locks - Makes it tougher to cut locks off. Keeps people honest. Key mechanism is a nice design

## Features

- MAXIMUM THEFT DETERRENCE: Secure rear and side enclosed trailer doors with a pick-resistant puck lock that conceals the shackle for added protection. The fully shielded shackle helps block bolt cutters and prying tools, while the robust lock body resists impact and tampering.
- CORROSION-RESISTANT STRENGTH: Rely on rugged construction that stands up to weather and tough jobs. Solid aircraft-grade aluminum resists corrosion and tampering, and the protected shackle design helps prevent common attacks so your gear stays locked down season after season.
- FITS ENCLOSED TRAILER HASPS: Install quickly on rear and side doors configured with swivel hasps. The enlarged rear opening on the 400XL accommodates common enclosed trailer hardware for a confident fit, helping ensure secure engagement and reliable daily use across routes.
- CONVENIENT KEYED-ALIKE SET: Streamline access without juggling extras when managing multiple doors. Each lock includes 2 keys, and every key in the set operates both locks for simple operation, faster loadouts, and fewer hassles for owners, drivers, and fleet managers on every job.
- MADE IN THE USA: Proudly manufactured to high-quality standards domestically to ensure reliable materials and craftsmanship with strict quality control and customer support. Tight tolerances and quality inspection help deliver consistent performance and dependable protection.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B089XHNSG7 |
| Additional Features | Key Lock |
| Best Sellers Rank | #42,562 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #112 in Keyed Padlocks |
| Brand | Proven Industries |
| Brand Name | Proven Industries |
| Color | Blue |
| Control Method | Touch |
| Controller Type | Hand Control |
| Customer Reviews | 4.5 out of 5 stars 219 Reviews |
| Included Components | 2 puck locks and 2 keys per lock |
| Lock Type | Key Lock |
| Manufacturer | Proven Locks |
| Manufacturer Part Number | 400XL |
| Material | Aluminum |
| Material Type | Aluminum |
| Model Number | 400XL |
| Number of Pieces | 2 |
| Recommended Uses For Product | securing enclosed trailer doors and protecting personal belongings |
| Special Feature | Key Lock |
| Style | Modern |
| Style Name | Modern |
| UPC | 729573594715 |
| Unit Count | 2 Count |

## Product Details

- **Brand:** Proven Industries
- **Lock Type:** Key Lock
- **Material:** Aluminum
- **Recommended Uses For Product:** securing enclosed trailer doors and protecting personal belongings
- **Special Feature:** Key Lock

## Images

![Proven Industries Puck Lock Set, Model 400XL, 2-Pack, Hidden Shackle, Keyed Alike, 6061 Solid Aluminum, Shackle Opening 1 3/4 x 1 3/4 x 7/8 in, Depth 1 1/4 in, Made in USA, Blue - Image 1](https://m.media-amazon.com/images/I/61nqmJIdu9L.jpg)
![Proven Industries Puck Lock Set, Model 400XL, 2-Pack, Hidden Shackle, Keyed Alike, 6061 Solid Aluminum, Shackle Opening 1 3/4 x 1 3/4 x 7/8 in, Depth 1 1/4 in, Made in USA, Blue - Image 2](https://m.media-amazon.com/images/I/71qJW+d8I8L.jpg)
![Proven Industries Puck Lock Set, Model 400XL, 2-Pack, Hidden Shackle, Keyed Alike, 6061 Solid Aluminum, Shackle Opening 1 3/4 x 1 3/4 x 7/8 in, Depth 1 1/4 in, Made in USA, Blue - Image 3](https://m.media-amazon.com/images/I/71hMZQxwY6L.jpg)
![Proven Industries Puck Lock Set, Model 400XL, 2-Pack, Hidden Shackle, Keyed Alike, 6061 Solid Aluminum, Shackle Opening 1 3/4 x 1 3/4 x 7/8 in, Depth 1 1/4 in, Made in USA, Blue - Image 4](https://m.media-amazon.com/images/I/71XtvEHLeAL.jpg)
![Proven Industries Puck Lock Set, Model 400XL, 2-Pack, Hidden Shackle, Keyed Alike, 6061 Solid Aluminum, Shackle Opening 1 3/4 x 1 3/4 x 7/8 in, Depth 1 1/4 in, Made in USA, Blue - Image 5](https://m.media-amazon.com/images/I/71j7wRpMD6L.jpg)

## Available Options

This product comes in different **Color** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good price for a well made lock!
*by D***R on May 6, 2026*

Super easy to install and is compatibilite. Very well made and fits securely. A must have for security and at a great value.

### ⭐⭐⭐⭐⭐ Good locks
*by P***R on April 15, 2026*

Makes it tougher to cut locks off. Keeps people honest. Key mechanism is a nice design

### ⭐⭐⭐⭐⭐ Easy to use and good quality
*by M***G on March 25, 2026*

Excellent lock, fits perfectly, it definitely has some weight to it, unlocking it is a little cumbersome, but to lock it up, you just push the key lock in by hand…. Simple

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**Shop now:** [https://www.desertcart.sk/products/227442244-proven-industries-puck-lock-set-model-400xl-2-pack-hidden](https://www.desertcart.sk/products/227442244-proven-industries-puck-lock-set-model-400xl-2-pack-hidden)

---

*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-05-30*