---
product_id: 78892661
title: "Proven Industries Model 2178-B Trailer Lock, Fits 2-Inch Bulldog or Ram Trailer Couplers, Made in The USA, (Black)"
brand: "proven industries"
price: "€ 574.30"
currency: EUR
in_stock: true
reviews_count: 9
category: "Proven Industries"
url: https://www.desertcart.hr/products/78892661-proven-industries-model-2178-b-trailer-lock-fits-2-inch
store_origin: HR
region: Croatia
---

# Hardened steel lock body Pick-proof unique key design Power-tool resistant cover Proven Industries Model 2178-B Trailer Lock, Fits 2-Inch Bulldog or Ram Trailer Couplers, Made in The USA, (Black)

**Brand:** proven industries
**Price:** € 574.30
**Availability:** ✅ In Stock

## Summary

> 🔐 Lock it down like a pro — because your trailer deserves the best!

## Quick Answers

- **What is this?** Proven Industries Model 2178-B Trailer Lock, Fits 2-Inch Bulldog or Ram Trailer Couplers, Made in The USA, (Black) by proven industries
- **How much does it cost?** € 574.30 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/78892661-proven-industries-model-2178-b-trailer-lock-fits-2-inch)

## 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:** Custom-designed for 2-inch Ram & Bulldog couplers only
- • **Made in the USA:** Crafted with precision and quality control from start to finish
- • **Unbreakable Security:** Hardened alloy steel resists hammers, cutters & crowbars
- • **Pick-Proof Innovation:** Exclusive key system blocks lockpicking & key duplication
- • **Heavy-Duty Peace of Mind:** 13.6 lbs of industrial-grade protection for your trailer

## Overview

The Proven Industries Model 2178-B Trailer Lock is a heavy-duty, industrial-grade security device designed specifically for 2-inch Ram and Bulldog trailer couplers. Constructed from hardened alloy steel with a power-tool resistant cover, it features a unique pick-proof key system to prevent unauthorized access. Made in the USA, this 13.6-pound lock offers robust protection against theft, ensuring your trailer stays secure wherever you go.

## Description

Buy Proven Industries Model 2178-B Trailer Lock, Fits 2-Inch Bulldog or Ram Trailer Couplers, Made in The USA, (Black): Hitch Locks - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Good product - Very secure and easy to apply to hitch
Review: being a good trained monkey I soon got the hang of it - This lock is outstanding. Fits my Bulldog hitch coupler perfectly. Only minor gripe is the learning curve for inserting the key to unlock. Finding the keyhole in the blind was difficult at first forcing me to lie on the ground to look underneath to insert the key. However, being a good trained monkey I soon got the hang of it. I can see why it might deter some theives from just the inconvienience of having to get low enough to see. After a few uses, I can insert the key easily from above now that I know the alignment. This lock is heavy, well designed and easy to install and remove. I am very pleased with my purchase and have every confidence that no one is going to drive off with my trailer when the lock is installed. I highly recommend. Sure it's expensive, but when weighed againt protection of my trailer and contents, it is well worth the price I paid. I plan to buy again for my next trailer.

## Features

- HEAVY-DUTY TRAILER LOCK: It’s important to do everything you can to protect your belongings and your trailer or camper from being stolen. This strong coupler lock fits select 2-inch Ram or BullDog 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 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: This custom-tailored lock will only mount on specific 2-inch Ram or BullDog-style 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 |
|---------------|-------|
| ASIN | B01IRA72NC |
| Best Sellers Rank | #275,930 in Automotive ( See Top 100 in Automotive ) #358 in Towing Hitch Locks |
| Brand Name | Proven Industries |
| Color | Black |
| Customer Reviews | 4.7 4.7 out of 5 stars (152) |
| Item Dimensions | 7.26 x 5.13 x 8.36 inches |
| Lock Type | Pin Tumbler |
| Manufacturer | Proven Locks |
| Material Type | Alloy Steel |
| Model Number | 2178 B |
| Style Name | Industrial |
| UPC | 709293265713 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** Proven Industries
- **Item dimensions L x W x H:** 7.26 x 5.13 x 8.36 inches
- **Lock Type:** Pin Tumbler
- **Material:** Alloy Steel
- **Style:** Industrial

## Images

![Proven Industries Model 2178-B Trailer Lock, Fits 2-Inch Bulldog or Ram Trailer Couplers, Made in The USA, (Black) - Image 1](https://m.media-amazon.com/images/I/81Wpl3tQUfL.jpg)
![Proven Industries Model 2178-B Trailer Lock, Fits 2-Inch Bulldog or Ram Trailer Couplers, Made in The USA, (Black) - Image 2](https://m.media-amazon.com/images/I/71tS3NBReUL.jpg)
![Proven Industries Model 2178-B Trailer Lock, Fits 2-Inch Bulldog or Ram Trailer Couplers, Made in The USA, (Black) - Image 3](https://m.media-amazon.com/images/I/71zUTsFGX6L.jpg)
![Proven Industries Model 2178-B Trailer Lock, Fits 2-Inch Bulldog or Ram Trailer Couplers, Made in The USA, (Black) - Image 4](https://m.media-amazon.com/images/I/71SwtQrI8SL.jpg)
![Proven Industries Model 2178-B Trailer Lock, Fits 2-Inch Bulldog or Ram Trailer Couplers, Made in The USA, (Black) - Image 5](https://m.media-amazon.com/images/I/71YjTrKjeiL.jpg)

## Available Options

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

## Questions & Answers

**Q: How do I figure out which lock I need?**
A: Start by finding out your coupler size — it’ll be either 2-inch or 2-5/16-inch. Then, compare your coupler to the photos in our listing to see which style matches. That’ll help you choose the right lock for your setup.

**Q: What if I can't find my coupler style?**
A: No problem! Just contact our Proven Industries support team through Amazon messanger and send us a clear photo of your coupler. We’ll be happy to take a look and let you know exactly which lock model will work best for you.

**Q: Why should I pay more for a Proven Industries lock?**
A: Proven Industries locks are built tougher and smarter to help prevent real-world theft attempts. You’re paying for unmatched security, premium quality, and the peace of mind that your trailer is truly protected.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good product
*by R***K on September 2, 2025*

Very secure and easy to apply to hitch

### ⭐⭐⭐⭐⭐ being a good trained monkey I soon got the hang of it
*by R***N on March 31, 2018*

This lock is outstanding. Fits my Bulldog hitch coupler perfectly. Only minor gripe is the learning curve for inserting the key to unlock. Finding the keyhole in the blind was difficult at first forcing me to lie on the ground to look underneath to insert the key. However, being a good trained monkey I soon got the hang of it. I can see why it might deter some theives from just the inconvienience of having to get low enough to see. After a few uses, I can insert the key easily from above now that I know the alignment. This lock is heavy, well designed and easy to install and remove. I am very pleased with my purchase and have every confidence that no one is going to drive off with my trailer when the lock is installed. I highly recommend. Sure it's expensive, but when weighed againt protection of my trailer and contents, it is well worth the price I paid. I plan to buy again for my next trailer.

### ⭐⭐⭐⭐⭐ Perfect fit.
*by J***Y on May 22, 2025*

Perfect fit. Very well made and sleek design. No longer will I worry about the safety of my new trailer. Definitely worth the money.

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.hr/products/78892661-proven-industries-model-2178-b-trailer-lock-fits-2-inch](https://www.desertcart.hr/products/78892661-proven-industries-model-2178-b-trailer-lock-fits-2-inch)

---

*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-04-25*