---
product_id: 244194674
title: "Proven Industries Model 400XL Puck-Lock Set, Made in The USA, Pack of 3, (Blue)"
brand: "proven industries"
price: "€ 390.79"
currency: EUR
in_stock: true
reviews_count: 8
category: "Proven Industries"
url: https://www.desertcart.fi/products/244194674-proven-industries-model-400xl-puck-lock-set-made-in-usa
store_origin: FI
region: Finland
---

# Unique anti-copy key system Aircraft-grade 6061 aluminum Pick & cut resistant design Proven Industries Model 400XL Puck-Lock Set, Made in The USA, Pack of 3, (Blue)

**Brand:** proven industries
**Price:** € 390.79
**Availability:** ✅ In Stock

## Summary

> 🔐 Lock in peace of mind with the ultimate puck protection!

## Quick Answers

- **What is this?** Proven Industries Model 400XL Puck-Lock Set, Made in The USA, Pack of 3, (Blue) by proven industries
- **How much does it cost?** € 390.79 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/244194674-proven-industries-model-400xl-puck-lock-set-made-in-usa)

## 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 1 3/4" x 1 3/4" shackle opening fits swivel hasps on enclosed trailer doors perfectly.
- • **Unbreakable Armor:** Crafted from aircraft-grade 6061 aluminum for unmatched corrosion and tamper resistance.
- • **Invisible Fortress:** Hidden, fully shielded shackles block bolt cutters and prying tools—security you can’t see but can trust.
- • **Keyed for Convenience:** All three locks come keyed alike with a patented anti-copy key design—no fumbling, no duplicates.
- • **Made in the USA, Trusted Worldwide:** Proven Industries’ dedication to quality means your trailer’s security is backed by American craftsmanship.

## Overview

The Proven Industries Model 400XL Puck-Lock Set is a pack of three heavy-duty, aircraft-grade aluminum locks designed specifically for enclosed trailers. Featuring a hidden shackle design resistant to picking, cutting, and corrosion, these locks come keyed alike with a unique anti-copy key system. Made in the USA, they offer a perfect fit for swivel hasps and deliver top-tier security to protect your valuable assets.

## Description

Buy Proven Industries Model 400XL Puck-Lock Set, Made in The USA, Pack of 3, (Blue): Hitch Locks - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Great product! - Best trailer locks I've ever had. They are easy to misplace because they don't have a clow or hook. Snook sleek and a great looking finish.
Review: Best money can buy - I love this puck lock. It was easy to install, built to last, value and security for our trailer is worth every penny. We decided to purchased security locked bc we had our trailer stolen and got it back without our personal belongings. I did research and found this one. Worth peace of mind and knowing that our trailer will not get stolen again. I highly recommend it.

## Features

- HEAVY-DUTY PUCK LOCKS: It’s important to do everything you can to protect your belongings and your trailer from being stolen. Our strong and pick-resistant puck locks help keep your rear and side enclosed trailer doors secure.
- TOUGH PUCK LOCKS: These padlock cylinders are constructed from aircraft-grade 6061 solid aluminum, so they’re resistant to picking and corrosion. Each lock features a hidden and fully shielded shackle that protects against bolt cutters and prying tools.
- UNIQUE KEY DESIGN: Our puck locks have a special key design that prevents lockpicking and deters would-be thieves from making a copy of your lock keys. Each lock comes with 2 keys, and all keys are keyed alike for your convenience.
- LOCK DIMENSIONS & SIZES: Each puck lock has a large opening on the back to accommodate for swivel hasps on an enclosed trailer door. The shackle opening measures 1 3/4" L x 1 3/4" W x 7/8" H and has a depth of 1 1/4".
- PROVEN INDUSTRIES: We are dedicated to providing our customers with the most effective trailer locks on the market. We carefully research and manufacture our locking systems from conception to fabrication in the USA.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08B1R9BD1 |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #34,645 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #87 in Keyed Padlocks |
| Brand | Proven Industries |
| Color | Blue |
| Control Method | Touch |
| Controller Type | Hand Control |
| Customer Reviews | 4.4 4.4 out of 5 stars (224) |
| Date First Available | June 11, 2020 |
| Item Package Quantity | 1 |
| Item Weight | 3.16 pounds |
| Item model number | 400XL |
| Lock Type | Key Lock |
| Manufacturer | Proven Industries |
| Material | Aluminum |
| Model Name | 400XL |
| Number of Pieces | 3 |
| Package Dimensions | 6.81 x 3.31 x 3.23 inches |
| Part Number | 400XL |
| Shape | Rectangular |
| Style | Modern |
| Type of Bulb | lock |
| UPC | 729573594777 |

## Product Details

- **Brand:** Proven Industries
- **Color:** Blue
- **Lock Type:** Key Lock
- **Material:** Aluminum
- **Style:** Modern

## Images

![Proven Industries Model 400XL Puck-Lock Set, Made in The USA, Pack of 3, (Blue) - Image 1](https://m.media-amazon.com/images/I/61QgGo0GwuL.jpg)
![Proven Industries Model 400XL Puck-Lock Set, Made in The USA, Pack of 3, (Blue) - Image 2](https://m.media-amazon.com/images/I/71PM9ErhT8L.jpg)
![Proven Industries Model 400XL Puck-Lock Set, Made in The USA, Pack of 3, (Blue) - Image 3](https://m.media-amazon.com/images/I/71hMZQxwY6L.jpg)
![Proven Industries Model 400XL Puck-Lock Set, Made in The USA, Pack of 3, (Blue) - Image 4](https://m.media-amazon.com/images/I/51JKkuqKPjL.jpg)
![Proven Industries Model 400XL Puck-Lock Set, Made in The USA, Pack of 3, (Blue) - Image 5](https://m.media-amazon.com/images/I/71j7wRpMD6L.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great product!
*by B***O on January 13, 2026*

Best trailer locks I've ever had. They are easy to misplace because they don't have a clow or hook. Snook sleek and a great looking finish.

### ⭐⭐⭐⭐⭐ Best money can buy
*by A***Y on December 15, 2025*

I love this puck lock. It was easy to install, built to last, value and security for our trailer is worth every penny. We decided to purchased security locked bc we had our trailer stolen and got it back without our personal belongings. I did research and found this one. Worth peace of mind and knowing that our trailer will not get stolen again. I highly recommend it.

### ⭐⭐⭐⭐⭐ Excellent locks!
*by J***S on January 2, 2026*

These are very nice locks. They fit well and have a hard to pick key slot so I feel like my trailer is safer from thieves than with other style locks I've used in the past.

## Frequently Bought Together

- Proven Industries Puck Lock 3 Pack of 400XL | Best Trailer Lock with Hidden Shackle | All Locks Keyed Alike | (Blue)
- CARTMAN Heavy Duty Trailer Lock, Universal Security Tire Clamp, Adjustable Anti-Theft Lock for Trailers SUV Boats ATVs Motorcycles Golf Cart, 3 Keys

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**Shop now:** [https://www.desertcart.fi/products/244194674-proven-industries-model-400xl-puck-lock-set-made-in-usa](https://www.desertcart.fi/products/244194674-proven-industries-model-400xl-puck-lock-set-made-in-usa)

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-03-07*