---
product_id: 7757161
title: "Master Lock Trailer Hitch Lock, Fits 1-7/8 in., 2 in., and Most 2-5/16 in. Trailer Couplers, Weather Resistant Automotive Hitch Lock with Keys, 377KA"
brand: "master lock"
price: "₨30884"
currency: LKR
in_stock: true
reviews_count: 13
category: "Master Lock"
url: https://www.desertcart.lk/products/7757161-master-lock-trailer-hitch-lock-fits-1-7-8-in
store_origin: LK
region: Sri Lanka
---

# Fits 3 coupler sizes (1-7/8", 2", 2-5/16") Weather-resistant aluminum diecast finish Advanced pick & pry resistant lock Master Lock Trailer Hitch Lock, Fits 1-7/8 in., 2 in., and Most 2-5/16 in. Trailer Couplers, Weather Resistant Automotive Hitch Lock with Keys, 377KA

**Brand:** master lock
**Price:** ₨30884
**Availability:** ✅ In Stock

## Summary

> 🔐 Lock in your trailer’s safety and never look back!

## Quick Answers

- **What is this?** Master Lock Trailer Hitch Lock, Fits 1-7/8 in., 2 in., and Most 2-5/16 in. Trailer Couplers, Weather Resistant Automotive Hitch Lock with Keys, 377KA by master lock
- **How much does it cost?** ₨30884 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/7757161-master-lock-trailer-hitch-lock-fits-1-7-8-in)

## 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

- • **Fortress-Level Security:** Advanced locking mechanism engineered to resist picking and prying, keeping your trailer locked tight.
- • **Universal Fit, Zero Hassle:** Securely fits most trailer couplers from 1-7/8" to 2-5/16", eliminating compatibility guesswork.
- • **Built to Brave the Elements:** Durable aluminum diecast finish resists rust and corrosion, perfect for year-round outdoor use.
- • **Trusted Legacy, Lifetime Peace:** Backed by Master Lock’s Limited Lifetime Warranty—security you can count on for years to come.
- • **Effortless Installation & Removal:** Quick, tool-free setup with a ratcheting design that locks without needing the key in place.

## Overview

The Master Lock 377KA Trailer Hitch Lock offers a versatile fit for 1-7/8", 2", and most 2-5/16" trailer couplers, featuring an advanced locking mechanism that resists picking and prying. Its weather-resistant aluminum diecast finish ensures durability against rust and corrosion, while the easy ratcheting installation makes securing your trailer quick and hassle-free. Trusted by professionals and backed by a Limited Lifetime Warranty, this lock delivers reliable, long-term protection for your valuable trailer.

## Description

The Master Lock No. 377KA features a trailer coupler lock, designed to fit 1-7/8 inch (48mm), 2 inch (51mm) and most 2-5/16 inch (59mm) trailer couplers. The advanced locking mechanism provides resistance to picking and prying. The Limited Lifetime Warranty provides peace of mind from a brand you can trust.

Review: Worth every single penny - Amazing product !!!! Works perfectly, great price and as described 👍🏻
Review: Easy to use, secure and very sturdy. - Bought my first one 15 years ago and it still works great, you can push it shut in a ratching fashion without even having the key in it. Fits trailers with 1 7/8" , 2" and 2 5/16" ball socket. Bought another for a second trailer. The design would make it difficult to pry it saw off. Much better than the u-bolt over the top design which only locks on one side and could be sawed quickly with a saws all of pryed in the non-locking side. For extra security use one of these and a lock through the latch and it isn't going anywhere.

## Features

- Fits 1-7/8 inch (48mm), 2 inch (51mm) and most 2-5/16 inch (59mm) trailer couplers
- Advanced locking mechanism resists picking and prying
- Easy to install and remove
- Aluminum diecast finish resists rust and corrosion
- Limited Lifetime Warranty provides peace of mind from a brand you can trust.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001HATY36 |
| Best Sellers Rank | #57,934 in Automotive ( See Top 100 in Automotive ) #104 in Towing Hitch Locks |
| Brand | Master Lock |
| Customer Reviews | 4.5 4.5 out of 5 stars (3,624) |
| Date First Available | October 3, 2008 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1.83 pounds |
| Item model number | 377KA |
| Manufacturer | Master Lock |
| Manufacturer Part Number | 377KA |
| Model | Trailer Hitch Lock |
| Product Dimensions | 5.6 x 4.3 x 2.8 inches |
| Special Features | Weather Resistant |

## Images

![Master Lock Trailer Hitch Lock, Fits 1-7/8 in., 2 in., and Most 2-5/16 in. Trailer Couplers, Weather Resistant Automotive Hitch Lock with Keys, 377KA - Image 1](https://m.media-amazon.com/images/I/51fclfwUssL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Worth every single penny
*by N***4 on July 16, 2025*

Amazing product !!!! Works perfectly, great price and as described 👍🏻

### ⭐⭐⭐⭐⭐ Easy to use, secure and very sturdy.
*by R***S on October 28, 2019*

Bought my first one 15 years ago and it still works great, you can push it shut in a ratching fashion without even having the key in it. Fits trailers with 1 7/8" , 2" and 2 5/16" ball socket. Bought another for a second trailer. The design would make it difficult to pry it saw off. Much better than the u-bolt over the top design which only locks on one side and could be sawed quickly with a saws all of pryed in the non-locking side. For extra security use one of these and a lock through the latch and it isn't going anywhere.

### ⭐⭐⭐⭐⭐ Camper lock
*by C***S on September 9, 2025*

Great quality

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**Shop now:** [https://www.desertcart.lk/products/7757161-master-lock-trailer-hitch-lock-fits-1-7-8-in](https://www.desertcart.lk/products/7757161-master-lock-trailer-hitch-lock-fits-1-7-8-in)

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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-02-20*