---
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: "€ 136.75"
currency: EUR
in_stock: true
category: "Master Lock"
url: https://www.desertcart.at/products/401461794-master-lock-master-lock-universal-size-fits-1-7-8inch
store_origin: AT
region: Austria
---

# Advanced pick-resistant lock Universal fit for 3 coupler sizes Rust & corrosion resistant alloy steel Master Lock Master Lock - Universal Size Fits 1-7/8inch 2inch and 2-5/16inch Couplers - Trailer Locks #389DAT

**Brand:** master lock
**Price:** € 136.75
**Availability:** ✅ In Stock

## Summary

> 🔐 Lock in your trailer’s safety — because your gear deserves the best.

## 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?** € 136.75 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/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

- • **Built to Brave the Elements:** Durable alloy steel resists rust and corrosion, ensuring long-lasting protection.
- • **Effortless Security Upgrade:** Simple installation and removal means you’re locked down in seconds, no hassle.
- • **Next-Level Theft Deterrence:** Bright red finish and advanced locking mechanism send a clear 'hands off' message.
- • **Trusted Brand, Proven Quality:** Master Lock’s 4.7-star rating from 15,950+ users guarantees reliable peace of mind.
- • **Universal Fit, Zero Guesswork:** Fits 1-7/8", 2", and 2-5/16" couplers for seamless trailer security.

## Overview

The Master Lock 389DAT universal coupler lock secures trailers with a robust, pick-resistant alloy steel mechanism. Designed to fit three common coupler sizes, it features a bright red finish to deter thieves and withstands rust and corrosion for reliable outdoor use. Trusted by thousands, it offers quick installation and superior protection for your valuable trailer.

## Description

......

## 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 |
| Additional Features | Advanced locking mechanism, Resists picking and prying, Rekeyable |
| Brand Name | Master Lock |
| Colour | Red |
| Control Method | Touch |
| Controller Type | Key Control |
| Customer Reviews | 4.7 4.7 out of 5 stars (15,995) |
| Global Trade Identification Number | 00071649263019 |
| Included Components | Key |
| Item Dimensions | 9.1 x 19.3 x 17 Centimeters |
| Item Type Name | Automotive Towing |
| Item Weight | 1 Pounds |
| Lock Type | Key Lock |
| Manufacturer | Master Lock |
| Manufacturer Part Number | 389DAT |
| Material Type | Alloy Steel |
| Model Name | 379ATPY |
| Model Number | 379ATPY |
| Number of Items | 1 |
| Number of Pieces | 1 |
| Product Finish Type | Painted |
| Recommended Uses For Product | securing trailers |
| Shape | Rectangular |
| Style Name | Modern |
| UPC | 071649263019 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** Master Lock
- **Item dimensions L x W x H:** 9.1 x 19.3 x 17 Centimeters
- **Lock Type:** Key Lock
- **Material:** Alloy Steel
- **Special Feature:** 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/41tppByFngL.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/414FzQ-mS1L.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/31Lm+tjNx+L.jpg)
![Master Lock Master Lock - Universal Size Fits 1-7/8inch 2inch and 2-5/16inch Couplers - Trailer Locks #389DAT - Image 4](https://m.media-amazon.com/images/I/51j0ElX2eTL.jpg)

## Available Options

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

## 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.

## Frequently Bought Together

- Master Lock - Universal Size Fits 1-7/8", 2", and 2-5/16" Couplers - Trailer Locks #389DAT
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**Shop now:** [https://www.desertcart.at/products/401461794-master-lock-master-lock-universal-size-fits-1-7-8inch](https://www.desertcart.at/products/401461794-master-lock-master-lock-universal-size-fits-1-7-8inch)

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*Product available on Desertcart Austria*
*Store origin: AT*
*Last updated: 2026-11-13*