---
product_id: 546082376
title: "Proven Locks S175 Trailer Coupler Lock 2 5/16 Inch Heavy Duty Anti Theft Hitch Lock for Trailer Boat RV"
brand: "proven industries"
price: "$457.05"
currency: USD
in_stock: true
reviews_count: 10
category: "Proven Industries"
url: https://www.desertcart.ec/products/546082376-proven-locks-s175-trailer-coupler-lock-2-5-16-inch
store_origin: EC
region: Ecuador
---

# Unique key design Heavy-duty security Stainless steel strength Proven Locks S175 Trailer Coupler Lock 2 5/16 Inch Heavy Duty Anti Theft Hitch Lock for Trailer Boat RV

**Brand:** proven industries
**Price:** $457.05
**Availability:** ✅ In Stock

## Summary

> 🔐 Secure Your Adventure with Proven Locks!

## Quick Answers

- **What is this?** Proven Locks S175 Trailer Coupler Lock 2 5/16 Inch Heavy Duty Anti Theft Hitch Lock for Trailer Boat RV by proven industries
- **How much does it cost?** $457.05 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/546082376-proven-locks-s175-trailer-coupler-lock-2-5-16-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:** Designed specifically for 2 5/16-inch couplers.
- • **Built to Last:** Constructed with a ductile iron shell and stainless steel pin.
- • **Next-Level Security:** Experience peace of mind with Proven's advanced locking technology.
- • **Unmatched Protection:** Keep your trailer and belongings safe from theft.
- • **Innovative Locking System:** Prevents lock picking and key duplication.

## Overview

The Proven Locks Model S175 is a heavy-duty trailer hitch lock designed for 2 5/16-inch couplers, featuring a robust stainless steel locking pin encased in a durable ductile iron shell. Its unique key design prevents unauthorized access, ensuring your trailer and belongings remain secure. With a sleek black powder-coated finish, this lock combines style and security for the modern adventurer.

## Description

desertcart.com: Proven Locks S175 Trailer Coupler Lock 2 5/16 Inch Heavy Duty Anti Theft Hitch Lock for Trailer Boat RV : Automotive

Review: Affordable Effective Insurance - I've had my eyes on the proven industries locks ever since a friend of mine showed me his "sleeve" style lock that he used for a tiny home I love those, but kept finding myself using that $300+ on other needed things. So when I saw this for under $100 I had to get it Great quality and tight fit. Thick hardened steel that wraps the entire ball-mount. Durable paint job and the price is right. Anything can be defeated, but this thing is beefy and a sledge wouldn't work, sawzall would take forever, and an angle grinder would take a lot of effort &likely damage the trailer (I'm a mechanic & steel worker so I know) Much better than the $40 tongue-locks. I have had several of those and they're mostly visual deterrents and fairly easy to remove. Bottom line, this thing works, you won't be disappointed
Review: Solid construction, easy to use, and atypical key cylinder type make it an effective theft deterrent - I've been looking for something to lockup my Camper's hitch for a while, but haven't been able to bring myself to buy one of the more expensive "box" locks that fully encases the hitch. I stumbled on this while reading a camper forum, and it looked like an amazing compromise between quality/deterrence and affordability. It's a SOLID hunk of metal, and yeah while anyone with an angle-grinder is going to be able to get through it eventually, it's gonna make noise and take a bit. More likely the thief will just pick an easier target. It's also very thoughfully designed, as the keyhole is underneath, protecting it from the weather. The lock is also nice in that it's not the more common pin-style lock, so it's going to require a more experienced lockpicker to defeat it (might take the Lockpicking lawyer 5 seconds, but he's an exceptional talent). It's certainly beyond what I can do. The last little bit that's nice is that the manufacturer includes a card in there to contact them directly (not desertcart) if you have any problems with fitment, and they'll swap it out for free. Excellent customer service even if I didn't have to use it.

## 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 5/16-inch trailer couplers and will keep your vehicle or boat secure.
- TOUGH RV LOCK: Our lock uses a solid stainless steel locking pin encased in a ductile iron shell for increased security. The exterior cover has a black powder-coated finish and is tough enough to stop burglars from using bolt cutters and crowbars on your lock.
- UNIQUE KEY DESIGN: This boat and trailer lock has a special key design that prevents anyone from picking the lock. Our 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: This custom-tailored lock will only mount on specific 2 5/16-inch couplers. Check the coupler sizes that are compatible with our lock hardware to ensure that the lock you select matches your trailer coupler.
- NEXT LEVEL SECURITY: We are dedicated to providing our customers with the most effective trailer locks on the market.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CBQVJ52F |
| Additional Features | Weather Resistant |
| Best Sellers Rank | #71,085 in Automotive ( See Top 100 in Automotive ) #141 in Towing Hitch Locks |
| Brand | Proven Industries |
| Brand Name | Proven Industries |
| Color | Black |
| Control Method | Push Button |
| Controller Type | Hand Control |
| Customer Reviews | 4.6 out of 5 stars 355 Reviews |
| Finish Types | Powder Coated |
| Included Components | Lock and 2 keys |
| Item Dimensions | 6 x 6 x 4 inches |
| Item Type Name | Lock |
| Item dimensions L x W x H | 6 x 6 x 4 inches |
| Lock Type | Pin Tumbler |
| Manufacturer | Proven Industries, Inc |
| Manufacturer Part Number | S175 |
| Material | Alloy Steel |
| Material Type | Alloy Steel |
| Model Name | S175 33 |
| Model Number | S175 |
| Recommended Uses For Product | Trailer Security |
| Special Feature | Weather Resistant |
| Style Name | Welded |
| UPC | 810104183253 |

## Images

![Proven Locks S175 Trailer Coupler Lock 2 5/16 Inch Heavy Duty Anti Theft Hitch Lock for Trailer Boat RV - Image 1](https://m.media-amazon.com/images/I/61J9Ksa+NQL.jpg)
![Proven Locks S175 Trailer Coupler Lock 2 5/16 Inch Heavy Duty Anti Theft Hitch Lock for Trailer Boat RV - Image 2](https://m.media-amazon.com/images/I/71I8NYZdikL.jpg)
![Proven Locks S175 Trailer Coupler Lock 2 5/16 Inch Heavy Duty Anti Theft Hitch Lock for Trailer Boat RV - Image 3](https://m.media-amazon.com/images/I/615Ia6IOHEL.jpg)
![Proven Locks S175 Trailer Coupler Lock 2 5/16 Inch Heavy Duty Anti Theft Hitch Lock for Trailer Boat RV - Image 4](https://m.media-amazon.com/images/I/71D5tf9u58L.jpg)
![Proven Locks S175 Trailer Coupler Lock 2 5/16 Inch Heavy Duty Anti Theft Hitch Lock for Trailer Boat RV - Image 5](https://m.media-amazon.com/images/I/71ZgDA6pO0L.jpg)

## Available Options

This product comes in different **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 buy 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

### ⭐⭐⭐⭐⭐ Affordable Effective Insurance
*by J***N on September 29, 2023*

I've had my eyes on the proven industries locks ever since a friend of mine showed me his "sleeve" style lock that he used for a tiny home I love those, but kept finding myself using that $300+ on other needed things. So when I saw this for under $100 I had to get it Great quality and tight fit. Thick hardened steel that wraps the entire ball-mount. Durable paint job and the price is right. Anything can be defeated, but this thing is beefy and a sledge wouldn't work, sawzall would take forever, and an angle grinder would take a lot of effort &likely damage the trailer (I'm a mechanic & steel worker so I know) Much better than the $40 tongue-locks. I have had several of those and they're mostly visual deterrents and fairly easy to remove. Bottom line, this thing works, you won't be disappointed

### ⭐⭐⭐⭐⭐ Solid construction, easy to use, and atypical key cylinder type make it an effective theft deterrent
*by T***. on January 1, 2024*

I've been looking for something to lockup my Camper's hitch for a while, but haven't been able to bring myself to buy one of the more expensive "box" locks that fully encases the hitch. I stumbled on this while reading a camper forum, and it looked like an amazing compromise between quality/deterrence and affordability. It's a SOLID hunk of metal, and yeah while anyone with an angle-grinder is going to be able to get through it eventually, it's gonna make noise and take a bit. More likely the thief will just pick an easier target. It's also very thoughfully designed, as the keyhole is underneath, protecting it from the weather. The lock is also nice in that it's not the more common pin-style lock, so it's going to require a more experienced lockpicker to defeat it (might take the Lockpicking lawyer 5 seconds, but he's an exceptional talent). It's certainly beyond what I can do. The last little bit that's nice is that the manufacturer includes a card in there to contact them directly (not amazon) if you have any problems with fitment, and they'll swap it out for free. Excellent customer service even if I didn't have to use it.

### ⭐⭐⭐⭐⭐ Best Value Coupler Lock
*by G***. on May 15, 2026*

This lock is awesome! Very beefy design and well made. And most importantly, Made In The USA! Customer service from Proven Industries is first rate. They care about their customers and follow through. Highly Recommended!

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**Shop now:** [https://www.desertcart.ec/products/546082376-proven-locks-s175-trailer-coupler-lock-2-5-16-inch](https://www.desertcart.ec/products/546082376-proven-locks-s175-trailer-coupler-lock-2-5-16-inch)

---

*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-06-12*