---
product_id: 43888865
title: "Proven Industries Model 2178-U Boat and Trailer Lock, Fits 2-Inch UFP Trailer Couplers, Secures Safety Chains, Made in The USA, (Black)"
brand: "proven industries"
price: "$631.10"
currency: USD
in_stock: true
reviews_count: 8
url: https://www.desertcart.us/products/43888865-proven-industries-model-2178-u-boat-and-trailer-lock-fits
store_origin: US
region: United States of America
---

# Hardened Steel Security Fits 2-Inch Couplers Made in the USA Proven Industries Model 2178-U Boat and Trailer Lock, Fits 2-Inch UFP Trailer Couplers, Secures Safety Chains, Made in The USA, (Black)

**Brand:** proven industries
**Price:** $631.10
**Availability:** ✅ In Stock

## Summary

> 🔐 Secure Your Adventure with Proven Protection!

## Quick Answers

- **What is this?** Proven Industries Model 2178-U Boat and Trailer Lock, Fits 2-Inch UFP Trailer Couplers, Secures Safety Chains, Made in The USA, (Black) by proven industries
- **How much does it cost?** $631.10 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/43888865-proven-industries-model-2178-u-boat-and-trailer-lock-fits)

## 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

- • **Custom Fit:** Designed specifically for 2-inch UFP trailer couplers for a perfect match.
- • **Proven Quality:** Manufactured in the USA with a commitment to excellence.
- • **Tough Exterior:** Resistant to power tools, hammers, and bolt cutters for maximum security.
- • **Innovative Key Design:** Unique key system prevents lockpicking and key duplication.
- • **Ultimate Theft Deterrent:** Heavy-duty construction keeps your trailer safe from thieves.

## Overview

The Proven Industries Model 2178-U Boat and Trailer Lock is a heavy-duty security solution designed to fit 2-inch UFP trailer couplers. Made in the USA, this lock features hardened steel construction and a unique key design to prevent unauthorized access. Its robust exterior is engineered to withstand various forms of attack, ensuring your trailer and belongings remain safe. With a custom fit for select couplers, this lock is the ultimate choice for peace of mind on the road.

## Description

Proven Industries Model 2178-U Boat and Trailer Lock, Fits 2-Inch UFP Trailer Couplers, Secures Safety Chains, Made in The USA, (Black)

## Features

- HEAVY-DUTY TRAILER LOCK: It’s important to do everything you can to protect your belongings and your boat or trailer from being stolen. This strong coupler lock fits select 2-inch UFP trailer couplers and will keep your trailer secure.
- TOUGH LOCK: The locking parts on this device are constructed from hardened steel for increased security, and the exterior cover is tough enough to prevent burglars from using power tools, hammers, bolt cutters, and crowbars on your lock.
- UNIQUE KEY DESIGN: This boat and trailer lock has a special key design that prevents lockpicking. Our innovative key system also features an interior locking mechanism that deters would-be thieves from making a copy of your key.
- CUSTOM TRAILER-COUPLER LOCK: Our patented lock design will allow you to secure most standard S-hook style safety chains in lock. This custom-tailored lock will only mount on specific 2-inch UPF couplers. Check the coupler sizes that are compatible with our lock hardware to ensure that the lock you select matches your trailer coupler.
- 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 |
|---------------|-------|
| Manufacturer | Proven Locks |
| Brand | Proven Industries |
| Package Dimensions | 7 x 6 x 6 inches |
| Country of Origin | USA |
| Item model number | 2178 U |
| Is Discontinued By Manufacturer | No |
| Manufacturer Part Number | 2178 U |

## Images

![Proven Industries Model 2178-U Boat and Trailer Lock, Fits 2-Inch UFP Trailer Couplers, Secures Safety Chains, Made in The USA, (Black) - Image 1](https://m.media-amazon.com/images/I/71MAs0OSQBL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great lock
*by D***N on June 9, 2025*

Absolute unit

### ⭐⭐⭐⭐⭐ Absolutely secure
*by M***G on October 14, 2024*

I searched high and low to find the best possible security solution for my boat. I had my boat (Yamaha 242xe) stolen last spring. The thieves cut through the Marina’s fence and gate. The went straight to my boat and cut through the cheap box store hitch pin lock I had on it in short order. The boat was gone in under 10 minutes and never recovered, even though there was security cameras point right at the hitch. When I decided to replace the boat, I wanted the highest security I could for it and came up with this product. I can’t say enough about it. Thrives will have to have a cutting torch or an angle grinder and a lot of time to get through this lock. I supplemented this with to wheel boots and a case hardened chain through the wheels and gps tracking. I believe that this lock is all that is needed but sometimes I go overkill, lol. I wouldn’t buy another boat without buying this locking device.

### ⭐⭐⭐⭐⭐ Excellent attention to detail from Proven Industries
*by M***N on August 19, 2021*

The product was as expected - solid and (hopefully) enough to secure my trailer and boat. What really impressed me was the personal attention from Proven Industries regarding my Amazon order. I typically don't expect contact from the manufacturer of origin when ordering through Amazon, but received a call from Erica at Proven to confirm that I had ordered the correct item for myself. After a couple of exchanges of calls and emails, with photos of my trailer, I promptly received exactly the part I needed. Well done, Proven and Erica!

## Frequently Bought Together

- Proven Industries Model 2178-U Boat and Trailer Lock, Fits 2-Inch UFP Trailer Couplers, Secures Safety Chains, Made in The USA, (Black)
- Proven Industries Model 2178 Trailer Lock, Fits 2-Inch Trailer Couplers, Secures Safety Chains, Made in The USA, (Blue)
- Proven Industries Model 400XL Puck-Lock Set, Made in The USA, Pack of 3, (Black)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-05-11*