---
product_id: 288296365
title: "Proven Industries Model 2178 Trailer Lock, Fits 2-Inch Trailer Couplers, Secures Safety Chains, Made in The USA, (Blue)"
brand: "proven industries"
price: "$705.78"
currency: USD
in_stock: true
reviews_count: 5
category: "Proven Industries"
url: https://www.desertcart.us/products/288296365-proven-industries-model-2178-trailer-lock-fits-2-inch-trailer
store_origin: US
region: United States of America
---

# Proven Industries Model 2178 Trailer Lock, Fits 2-Inch Trailer Couplers, Secures Safety Chains, Made in The USA, (Blue)

**Brand:** proven industries
**Price:** $705.78
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** Proven Industries Model 2178 Trailer Lock, Fits 2-Inch Trailer Couplers, Secures Safety Chains, Made in The USA, (Blue) by proven industries
- **How much does it cost?** $705.78 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/288296365-proven-industries-model-2178-trailer-lock-fits-2-inch-trailer)

## 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

## Description

Without high-quality locks, you can’t protect your trailers and personal possessions. Our Model 2178 Trailer Lock is a safe, powerful lock designed to help you increase the security of your trailers or RVs. It can even be used to secure safety chains! The unique key design prevents people from creating a copy of your key. Help protect your possessions and work equipment with our incredible heavy-duty coupler lock.This custom-tailored trailer and RV lock is designed to fit only very specific 2-inch trailer couplers. Check to make sure that your coupler is compatible with the lock you select.Our secure trailer lock is easy to install and is made of 3 pieces: an inner slide, an exterior shield, and a puck lock. To use, attach the inner slide to your coupler and engage the latch. Place the exterior shield over the coupler and line up the 2 slide tabs. Then, place the puck lock over the tabs. Add this lock to your camper and travel-trailer accessories to add durable protection to your belongings.Proven Industries is a family-owned business dedicated to helping you safeguard your trailers from theft and damage. We manufacture our locks in the USA with care and attention to every detail. You can rely on our high-quality locking products.

Review: This is the best trailer lock I have ever seen. - This trailer lock is massive. It fits perfectly on my trailer. It leaves nothing exposed that a thief could exploit to remove it and steal the trailer. It also locks the latch down so it cannot be lifted up while the lock is on. The chain keeper works well and I have larger than usual hooks on the ends of the chains and they fit in there with room to spare. The compartment is also vented on the bottom to allow drainage if water gets in there. The keys are cut in such a fashion that duplication appears nearly impossible. I would recommend this lock to anyone who doesn't want their trailer stolen. It is a little pricey but very well engineered and heavy duty. Money well spent to protect thousands of dollars worth of trailer in my opinion!
Review: Great lock - Good quality lock. Put your chains inside the head as well. I would definitely recommend this lock. Worth the money.

## 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. Our strong coupler lock fits select 2-inch trailer couplers to help 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 stop burglars from using power tools, hammers, and crowbars on your lock.
- UNIQUE KEY DESIGN: Our trailer lock has a special key design that prevents anyone from picking the lock. This innovative key system also features an interior locking mechanism that stops 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 couplers. Make sure to 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 | B07DGP9VXG |
| Additional Features | Keyless |
| Brand | Proven Industries |
| Brand Name | Proven Industries |
| Color | Blue |
| Customer Reviews | 4.7 out of 5 stars 733 Reviews |
| Finish Types | Powder Coated |
| Included Components | Inner slide, exterior shield, puck lock |
| Item Dimensions | 16.2 x 11.4 x 11.4 centimeters |
| Item dimensions L x W x H | 16.2 x 11.4 x 11.4 centimeters |
| Lock Type | Key Lock |
| Lock type | Key Lock |
| Manufacturer | Proven Industries, Inc |
| Manufacturer Part Number | 2178 |
| Material | Alloy Steel |
| Material Type | Alloy Steel |
| Model Name | 2178-A |
| Model Number | 2 |
| Number of Pieces | 1 |
| Recommended Uses For Product | Securing trailers and RVs |
| Recommended uses for product | Securing trailers and RVs |
| Shape | Round |
| Smart Home Compatibility | Not Smart Home Compatible |
| Special features | Keyless |
| Style Name | Custom |
| UPC | 729573594159 |
| Unit Count | 1 Count |

## Product Details

- **Brand:** Proven Industries
- **Item dimensions L x W x H:** 8.6 x 7.58 x 5.13 inches
- **Lock Type:** Disc-Detainer
- **Material:** Alloy Steel
- **Special Feature:** Weather Resistant

## Images

![Proven Industries Model 2178 Trailer Lock, Fits 2-Inch Trailer Couplers, Secures Safety Chains, Made in The USA, (Blue) - Image 1](https://m.media-amazon.com/images/I/61rEPTWC6LL.jpg)
![Proven Industries Model 2178 Trailer Lock, Fits 2-Inch Trailer Couplers, Secures Safety Chains, Made in The USA, (Blue) - Image 2](https://m.media-amazon.com/images/I/71a7A7tG6OL.jpg)
![Proven Industries Model 2178 Trailer Lock, Fits 2-Inch Trailer Couplers, Secures Safety Chains, Made in The USA, (Blue) - Image 3](https://m.media-amazon.com/images/I/717B9rSeHqL.jpg)
![Proven Industries Model 2178 Trailer Lock, Fits 2-Inch Trailer Couplers, Secures Safety Chains, Made in The USA, (Blue) - Image 4](https://m.media-amazon.com/images/I/71f6h6x8bjL.jpg)
![Proven Industries Model 2178 Trailer Lock, Fits 2-Inch Trailer Couplers, Secures Safety Chains, Made in The USA, (Blue) - Image 5](https://m.media-amazon.com/images/I/71W3u+oJdnL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ This is the best trailer lock I have ever seen.
*by N***R on 24 May 2026*

This trailer lock is massive. It fits perfectly on my trailer. It leaves nothing exposed that a thief could exploit to remove it and steal the trailer. It also locks the latch down so it cannot be lifted up while the lock is on. The chain keeper works well and I have larger than usual hooks on the ends of the chains and they fit in there with room to spare. The compartment is also vented on the bottom to allow drainage if water gets in there. The keys are cut in such a fashion that duplication appears nearly impossible. I would recommend this lock to anyone who doesn't want their trailer stolen. It is a little pricey but very well engineered and heavy duty. Money well spent to protect thousands of dollars worth of trailer in my opinion!

### ⭐⭐⭐⭐⭐ Great lock
*by B***N on 9 August 2021*

Good quality lock. Put your chains inside the head as well. I would definitely recommend this lock. Worth the money.

### ⭐⭐⭐⭐⭐ Best product, and customer service! Couldn’t be happier.
*by L***A on 16 April 2021*

I am extremely happy with the fast customer service from proven industries. They were great, answered all my questions, and were a great help when I needed to exchange when I purchased the wrong size. The product itself was sturdy, thick, and I definitely feel it was worth the money!

## Frequently Bought Together

- Proven Industries Model 2178 Trailer Lock, Fits 2-Inch Trailer Couplers, Secures Safety Chains, Made in The USA, (Blue)
- Proven Industries Model 2516 Trailer Lock, Fits 2 5/16-Inch Couplers, Secures Safety Chains, Made in The USA, (Blue)
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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-06-23*