---
product_id: 401461794
title: "Master Lock Master Lock - Universal Size Fits 1-7/8inch 2inch and 2-5/16inch Couplers - Trailer Locks #389DAT"
brand: "master lock"
price: "R2772"
currency: ZAR
in_stock: false
reviews_count: 5
category: "Master Lock"
url: https://www.desertcart.co.za/products/401461794-master-lock-master-lock-universal-size-fits-1-7-8inch
store_origin: ZA
region: South Africa
---

# Advanced pick & pry resistant lock Rust & corrosion resistant bright red finish Universal fit for 1-7/8" to 2-5/16" couplers Master Lock Master Lock - Universal Size Fits 1-7/8inch 2inch and 2-5/16inch Couplers - Trailer Locks #389DAT

**Brand:** master lock
**Price:** R2772
**Availability:** ❌ Out of Stock

## Summary

> 🔐 Lock in security, unlock peace of mind.

## Quick Answers

- **What is this?** Master Lock Master Lock - Universal Size Fits 1-7/8inch 2inch and 2-5/16inch Couplers - Trailer Locks #389DAT by master lock
- **How much does it cost?** R2772 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/401461794-master-lock-master-lock-universal-size-fits-1-7-8inch)

## Best For

- master lock enthusiasts

## Why This Product

- Trusted master lock brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Weatherproof Warrior:** Durable brass construction with a rust and corrosion-resistant bright red finish ensures long-lasting protection in any environment.
- • **Effortless Installation & Removal:** No assembly required—slide it on and lock it in seconds, perfect for busy professionals on the go.
- • **Unmatched Security, Zero Compromise:** Advanced locking mechanism designed to resist picking and prying, keeping your trailer safe from theft.
- • **Fits Like a Glove, Universal Coverage:** Engineered to fit 1-7/8", 2", and 2-5/16" couplers, so you never have to worry about compatibility.
- • **Trusted by Thousands, Proven Peace of Mind:** With a 4.6-star rating from over 15,900 users, join the community securing their trailers with confidence.

## Overview

The Master Lock Universal Trailer Coupler Lock (#389DAT) offers a robust, weather-resistant security solution that fits a wide range of coupler sizes (1-7/8" to 2-5/16"). Featuring an advanced locking mechanism that resists picking and prying, this bright red, brass lock is easy to install and trusted by thousands for reliable trailer protection.

## Description

......

Review: I bought the Master Lock Universal Trailer Coupler Lock, and it's been a great addition to my RV setup. It fits perfectly on my 2-inch coupler. It’s solid, durable, and provides that extra layer of security when I’m parked at campgrounds or when my trailer’s stored. The lock is easy to use—just slide it on, lock it in place, and I feel much more confident leaving the trailer behind. It’s made of heavy-duty materials, so I’m not worried about it rusting or breaking. Overall, this Master Lock is a great value for the price and provides peace of mind that my trailer is secure. I highly recommend it to anyone with a trailer or RV!
Review: Excelente producto

## Features

- Coupler Lock,Universal
- Bright red finish discourages thief's from messing with your trailer
- Advanced locking mechanism resists picking and prying
- Resists rust and corrosion; Simple installation and removal

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01MYCT0LG |
| Assembly Required | No |
| Brand | Master Lock |
| Colour | Red |
| Country of Origin | USA |
| Customer Reviews | 4.6 4.6 out of 5 stars (15,900) |
| Date First Available | 25 June 2017 |
| Exterior | Brass |
| Generic Name | Automotive Towing |
| Item Dimensions LxWxH | 9.1 x 19.3 x 17 Centimeters |
| Item Weight | 454 g |
| Item model number | 379ATPY |
| Manufacturer | Master Lock |
| Manufacturer Part Number | 389DAT |
| Material | messing |
| Model | 379ATPY |
| Net Quantity | 1.0 Count |
| Product Dimensions | 9.14 x 19.3 x 17.02 cm; 453.59 g |
| Size | medium |
| Special Features | Advanced locking mechanism, Resists picking and prying, Rekeyable |

## Images

![Master Lock Master Lock - Universal Size Fits 1-7/8inch 2inch and 2-5/16inch Couplers - Trailer Locks #389DAT - Image 1](https://m.media-amazon.com/images/I/41AV9dOnCNL.jpg)
![Master Lock Master Lock - Universal Size Fits 1-7/8inch 2inch and 2-5/16inch Couplers - Trailer Locks #389DAT - Image 2](https://m.media-amazon.com/images/I/41T9mo8jxTL.jpg)
![Master Lock Master Lock - Universal Size Fits 1-7/8inch 2inch and 2-5/16inch Couplers - Trailer Locks #389DAT - Image 3](https://m.media-amazon.com/images/I/51134Jlr2-L.jpg)

## Questions & Answers

**Q: Which is better, this or a boot for a trailer?**
A: This is pretty good, fits any receiver and is sturdy.  I also have a boot, one that clamps on each side of the wheel, so much easier to use than the so called Denver Boot.  If someone wants your trailer bad enough locks and boots won't make any difference, but it sure will slow them down.

**Q: Are the keys universal or unique to each lock?**
A: The keys are unique to the lock. I ordered the 4 pack. The keys for one lock only works on that lock.

**Q: How many keys does this come with?**
A: That would be two

**Q: Will this lock work on a gooseneck trailer 2 5/16  hitch receiver?**
A: Yes, it works on mine, and the description of it states the sizes it will fit.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by J***E on 24 November 2024*

I bought the Master Lock Universal Trailer Coupler Lock, and it's been a great addition to my RV setup. It fits perfectly on my 2-inch coupler. It’s solid, durable, and provides that extra layer of security when I’m parked at campgrounds or when my trailer’s stored. The lock is easy to use—just slide it on, lock it in place, and I feel much more confident leaving the trailer behind. It’s made of heavy-duty materials, so I’m not worried about it rusting or breaking. Overall, this Master Lock is a great value for the price and provides peace of mind that my trailer is secure. I highly recommend it to anyone with a trailer or RV!

### ⭐⭐⭐⭐⭐ Review
*by R***E on 27 September 2025*

Excelente producto

### ⭐⭐⭐⭐⭐ Review
*by K***N on 12 June 2024*

Très bien. Va peut-être décourager les voleur de bas de game. Mais va retarder les experts. Acheter pour le prix et à la demande des assurances. J'ai aussi acheté une serrure pour la poignée de la main. Bon prix pour en décourager quelque un. Reste à voir si il va rouillé et être difficile à ouvrir. Abitibi Québec Canada

## Frequently Bought Together

- Master Lock - Universal Size Fits 1-7/8", 2", and 2-5/16" Couplers - Trailer Locks #389DAT
- CZC AUTO Black Trailer Hitch Coupler Lock, Dia 1/4 Inch, 3/4 Inch Span for Tow Boat RV Truck Car's Coupler (1 Pack, Black)
- CARTMAN Heavy Duty Trailer Lock Wheel Clamp, Universal Security Tire Lock, Adjustable Anti Theft Lock for Trailers SUV Boats ATVs Motorcycles Golf Cart

---

## 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.co.za/products/401461794-master-lock-master-lock-universal-size-fits-1-7-8inch](https://www.desertcart.co.za/products/401461794-master-lock-master-lock-universal-size-fits-1-7-8inch)

---

*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-02-04*