--- 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: "€ 87.15" currency: EUR in_stock: true category: "Master Lock" url: https://www.desertcart.be/products/7757161-master-lock-trailer-hitch-lock-fits-1-7-8-in store_origin: BE region: Belgium --- # Fits 3 common coupler sizes Weather-resistant aluminum 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:** € 87.15 **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?** € 87.15 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/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 - • **Next-Level Theft Defense:** Advanced locking mechanism engineered to resist picking and prying attacks. - • **Built to Brave the Elements:** Durable aluminum diecast finish protects against rust and corrosion, rain or shine. - • **Effortless Installation & Removal:** Quick and easy to secure your trailer without hassle—time saved is peace of mind gained. - • **Universal Fit for Ultimate Security:** Fits 1-7/8", 2", and most 2-5/16" trailer couplers—one lock to rule them all. - • **Trusted Brand with Lifetime Assurance:** Backed by Master Lock’s Limited Lifetime Warranty for confidence that lasts. ## Overview The Master Lock 377KA Trailer Hitch Lock secures 1-7/8", 2", and most 2-5/16" trailer couplers with an advanced pick- and pry-resistant mechanism. Its weather-resistant aluminum diecast finish ensures durability against rust and corrosion, while easy installation and a Limited Lifetime Warranty provide lasting peace of mind from a trusted brand. ## 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. ## 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 | #34,921 in Automotive ( See Top 100 in Automotive ) #80 in Towing Hitch Locks | | Brand | Master Lock | | Customer Reviews | 4.6 4.6 out of 5 stars (3,649) | | 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) ![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 2](https://m.media-amazon.com/images/I/51KcPMyCWXL.jpg) ![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 3](https://m.media-amazon.com/images/I/51YirndBv2L.jpg) ![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 4](https://m.media-amazon.com/images/I/51cvLErM-jL.jpg) ![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 5](https://m.media-amazon.com/images/I/51que3G4fOL.jpg) ## Available Options This product comes in different **Style** options. --- ## 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.be/products/7757161-master-lock-trailer-hitch-lock-fits-1-7-8-in](https://www.desertcart.be/products/7757161-master-lock-trailer-hitch-lock-fits-1-7-8-in) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-08-07*