--- 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: "€ 72.73" currency: EUR in_stock: true reviews_count: 13 category: "Master Lock" url: https://www.desertcart.pt/products/7757161-master-lock-trailer-hitch-lock-fits-1-7-8-in store_origin: PT region: Portugal --- # 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:** € 72.73 **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?** € 72.73 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/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 --- ## 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.pt/products/7757161-master-lock-trailer-hitch-lock-fits-1-7-8-in](https://www.desertcart.pt/products/7757161-master-lock-trailer-hitch-lock-fits-1-7-8-in) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-06-06*