--- product_id: 7757162 title: "Master Lock Black Universal Size Trailer Hitch Lock, Trailer Coupler Lock for Securing RV’s, Horse Trailers, Tool Trailers and More, 379ATPY" brand: "master lock" price: "€ 81.45" currency: EUR in_stock: true reviews_count: 13 category: "Master Lock" url: https://www.desertcart.de/products/7757162-master-lock-black-universal-size-trailer-hitch-lock-trailer-coupler store_origin: DE region: Germany --- # Advanced pick & pry resistant lock Universal fit for 3 coupler sizes Rust & corrosion resistant zinc build Master Lock Black Universal Size Trailer Hitch Lock, Trailer Coupler Lock for Securing RV’s, Horse Trailers, Tool Trailers and More, 379ATPY **Brand:** master lock **Price:** € 81.45 **Availability:** ✅ In Stock ## Summary > 🔐 Lock it down, stand out with confidence. ## Quick Answers - **What is this?** Master Lock Black Universal Size Trailer Hitch Lock, Trailer Coupler Lock for Securing RV’s, Horse Trailers, Tool Trailers and More, 379ATPY by master lock - **How much does it cost?** € 81.45 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.de](https://www.desertcart.de/products/7757162-master-lock-black-universal-size-trailer-hitch-lock-trailer-coupler) ## 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 - • **Sleek & Stealthy:** Matte black finish offers a professional, low-profile look that says 'secured' without shouting. - • **Next-Level Security:** Advanced locking mechanism deters picking and prying, keeping your trailer off-limits to thieves. - • **Effortless Operation:** Smooth key lock system with quick installation and removal—security without the struggle. - • **Universal Fit, Zero Hassle:** Fits 1-7/8", 2", & 2-5/16" trailer couplers seamlessly—one lock for all your trailers. - • **Built to Brave the Elements:** Durable zinc construction resists rust and corrosion, ensuring long-lasting protection outdoors. ## Overview The Master Lock 379ATPY is a universal trailer hitch lock engineered to fit multiple coupler sizes (1-7/8", 2", and 2-5/16") with a robust zinc body that resists rust and corrosion. Its advanced locking mechanism provides strong resistance against picking and prying, delivering reliable security for RVs, horse trailers, and tool trailers. Designed for easy installation and smooth operation, this sleek black lock offers professional-grade protection and peace of mind backed by a limited lifetime warranty. ## Description The Master Lock 379ATPY features a universal trailer coupler lock, designed to fit 1-7/8 in. (48 mm), 2 in. (51 mm) and most 2-5/16 in. (59 mm) 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 - Trailer hitch lock fits 1-7/8 in. (48mm), 2 in. (51mm) and most 2-5/16 in. (59mm) trailer couplers - Trailer lock is best used for vehicles, trailers, and RVs - Trailer coupler lock features advanced locking mechanism to resist picking and prying - Trailer hitch lock is constructed from zinc to resist rust and corrosion - Includes one trailer coupler lock, two keys ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000L9QRE8 | | Additional Features | Portable | | Best Sellers Rank | #1,420 in Automotive ( See Top 100 in Automotive ) #6 in Towing Hitch Locks | | Brand | Master Lock | | Brand Name | Master Lock | | Color | Black | | Control Method | Touch | | Controller Type | Hand Control | | Customer Reviews | 4.6 out of 5 stars 5,913 Reviews | | Finish Types | Polished | | Global Trade Identification Number | 00071649229220 | | Included Components | Unit^Instruction Guide | | Item Dimensions | 5.1 x 3.5 x 4.6 inches | | Item Type Name | Universal Trailer Hitch Lock | | Item Weight | 1 Pounds | | Item dimensions L x W x H | 5.1 x 3.5 x 4.6 inches | | Lock Type | Key Lock | | Manufacturer | Master Lock | | Manufacturer Part Number | 379ATPY | | Manufacturer Warranty Description | 1 year manufacturer | | Material | Zinc | | Material Type | Zinc | | Model Name | Universal Towing Coupler Lock, Steel | | Model Number | 379ATPY | | Number of Pieces | 1 | | Recommended Uses For Product | vehicles, trailers, RVs | | Shape | Rectangular | | Smart Home Compatibility | Not Smart Home Compatible | | Special Feature | Portable | | Style Name | Trailer Hitch Lock | | UPC | 071649229220 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** Master Lock - **Item dimensions L x W x H:** 5.1 x 3.5 x 4.6 inches - **Lock Type:** Key Lock - **Material:** Zinc - **Special Feature:** Portable ## Images ![Master Lock Black Universal Size Trailer Hitch Lock, Trailer Coupler Lock for Securing RV’s, Horse Trailers, Tool Trailers and More, 379ATPY - Image 1](https://m.media-amazon.com/images/I/81u7s58ERrL.jpg) ![Master Lock Black Universal Size Trailer Hitch Lock, Trailer Coupler Lock for Securing RV’s, Horse Trailers, Tool Trailers and More, 379ATPY - Image 2](https://m.media-amazon.com/images/I/61cc-WhWJcL.jpg) ![Master Lock Black Universal Size Trailer Hitch Lock, Trailer Coupler Lock for Securing RV’s, Horse Trailers, Tool Trailers and More, 379ATPY - Image 3](https://m.media-amazon.com/images/I/81hOrv-ySuL.jpg) ![Master Lock Black Universal Size Trailer Hitch Lock, Trailer Coupler Lock for Securing RV’s, Horse Trailers, Tool Trailers and More, 379ATPY - Image 4](https://m.media-amazon.com/images/I/91qj2nPog9L.jpg) ![Master Lock Black Universal Size Trailer Hitch Lock, Trailer Coupler Lock for Securing RV’s, Horse Trailers, Tool Trailers and More, 379ATPY - Image 5](https://m.media-amazon.com/images/I/61UPXMuNHeL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: If this does not work on our travel trail is it returnable?** A: It will it's universal **Q: Does this fit Airstreams?** A: I'm not sure what size the hookup is on an Austrian, but it did not fit my 27ft travel trailer, so I use it on my boat trailer instead **Q: Can these be rekeyed? I have alot of locks. All on same master lock key** A: I have 6 of these they can be rekeyed. Try a different lock smith. I would also say to have it keyed with the pad locks so you always only have one key for lots of locks. **Q: Can I get a key number the same as locks i Have** A: It would depend on the key # needed. Please feel free to message us with the key # you are looking to match to and we can tell you if it can be done. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by T***M on December 15, 2025* ### ⭐⭐⭐⭐⭐ Review *by W***B on March 17, 2026* ### ⭐⭐⭐⭐⭐ Review *by S***A on December 17, 2025* ## Frequently Bought Together - Master Lock 379ATPY Universal Trailer Hitch Lock , Black - MAXXHAUL 70472 Solid Rubber Heavy Duty Black Wheel Chock 2-Pack, 8" x 4" x 6" - RETRUE Trailer Tongue Coupler Lock, Trailer Hitch Lock,Dia 1/4 Inch, 3/4 Inch Span for Tow Boat RV Truck Car's Coupler, Black --- ## 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.de/products/7757162-master-lock-black-universal-size-trailer-hitch-lock-trailer-coupler](https://www.desertcart.de/products/7757162-master-lock-black-universal-size-trailer-hitch-lock-trailer-coupler) --- *Product available on Desertcart Germany* *Store origin: DE* *Last updated: 2026-05-05*