--- product_id: 7757162 title: "Black Universal Size Trailer Hitch Lock, Trailer Coupler Lock for Securing RV’s, Horse Trailers, Tool Trailers and More, 379ATPY" brand: "master lock" price: "334 zł" currency: PLN in_stock: true reviews_count: 8 category: "Master Lock" url: https://www.desertcart.pl/products/7757162-black-universal-size-trailer-hitch-lock-trailer-coupler-lock-securing store_origin: PL region: Poland --- # Advanced pick & pry resistant lock Universal fit for 3 coupler sizes Rust & corrosion resistant zinc build Black Universal Size Trailer Hitch Lock, Trailer Coupler Lock for Securing RV’s, Horse Trailers, Tool Trailers and More, 379ATPY **Brand:** master lock **Price:** 334 zł **Availability:** ✅ In Stock ## Summary > 🔐 Lock it down, stand out with confidence. ## Quick Answers - **What is this?** 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?** 334 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/7757162-black-universal-size-trailer-hitch-lock-trailer-coupler-lock-securing) ## 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. Review: Solid, Simple Trailer Hitch Lock That Adds Real Peace of Mind - The Master Lock 379ATPY universal trailer hitch lock is a straightforward, effective security solution that does exactly what it’s meant to do. If you’re looking for an easy way to secure a trailer without overthinking the setup, this lock delivers dependable protection with minimal hassle. Fit and compatibility are strong points. The universal design works well across different types of trailers, including RVs, utility trailers, horse trailers, and tool trailers. It fits securely over the coupler and blocks it effectively, preventing anyone from hitching up and towing off your trailer. Once installed, it’s very clear the trailer isn’t going anywhere. Build quality feels solid. The lock has a good weight to it and doesn’t feel thin or easily defeated. While no lock is completely theft-proof, this one is sturdy enough to act as a strong deterrent. It sends a clear message that the trailer is protected and not an easy target, which is often half the battle when it comes to theft prevention. Installation is quick and simple. You don’t need tools or complicated adjustments. It slides into place easily and locks securely. Removing it is just as easy when you’re ready to use the trailer, which makes it convenient for regular use without becoming annoying. The locking mechanism works smoothly. The key turns cleanly without sticking, and the lock opens and closes without feeling gritty or cheap. That’s important for something that may sit outdoors and be exposed to weather. So far, it’s held up well without signs of binding or corrosion. The black finish keeps it discreet while still looking tough and purposeful. It doesn’t draw unnecessary attention, but it’s obvious enough to let would-be thieves know the trailer is secured. It also looks clean and professional, whether the trailer is parked at home, a storage lot, or a campsite. Overall, this Master Lock trailer coupler lock is a reliable, easy-to-use security accessory that does its job well. Strong fit, solid construction, simple operation, and broad compatibility make it a smart choice for protecting trailers of all kinds. If you want added peace of mind without complexity, this is an easy five-star product. Review: Solid Protection ,Total Peace of Mind! - This Master Lock is an excellent product. It feels heavy-duty and secure, giving me way more confidence when I leave my RV at the campsite or in storage. The universal fit worked perfectly on my trailer coupler, and the black finish looks sleek while being weather-resistant. A small price to pay for such great security! ## 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 | #1,543 in Automotive ( See Top 100 in Automotive ) #7 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 5,885 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 Warranty Description | 1 year manufacturer | | Material | Zinc | | Material Type | Zinc | | Model Number | 379ATPY | | Recommended Uses For Product | vehicles, trailers, RVs | | Shape | Rectangular | | 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 ![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) ## 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 ### ⭐⭐⭐⭐⭐ Solid, Simple Trailer Hitch Lock That Adds Real Peace of Mind *by T***M on December 15, 2025* The Master Lock 379ATPY universal trailer hitch lock is a straightforward, effective security solution that does exactly what it’s meant to do. If you’re looking for an easy way to secure a trailer without overthinking the setup, this lock delivers dependable protection with minimal hassle. Fit and compatibility are strong points. The universal design works well across different types of trailers, including RVs, utility trailers, horse trailers, and tool trailers. It fits securely over the coupler and blocks it effectively, preventing anyone from hitching up and towing off your trailer. Once installed, it’s very clear the trailer isn’t going anywhere. Build quality feels solid. The lock has a good weight to it and doesn’t feel thin or easily defeated. While no lock is completely theft-proof, this one is sturdy enough to act as a strong deterrent. It sends a clear message that the trailer is protected and not an easy target, which is often half the battle when it comes to theft prevention. Installation is quick and simple. You don’t need tools or complicated adjustments. It slides into place easily and locks securely. Removing it is just as easy when you’re ready to use the trailer, which makes it convenient for regular use without becoming annoying. The locking mechanism works smoothly. The key turns cleanly without sticking, and the lock opens and closes without feeling gritty or cheap. That’s important for something that may sit outdoors and be exposed to weather. So far, it’s held up well without signs of binding or corrosion. The black finish keeps it discreet while still looking tough and purposeful. It doesn’t draw unnecessary attention, but it’s obvious enough to let would-be thieves know the trailer is secured. It also looks clean and professional, whether the trailer is parked at home, a storage lot, or a campsite. Overall, this Master Lock trailer coupler lock is a reliable, easy-to-use security accessory that does its job well. Strong fit, solid construction, simple operation, and broad compatibility make it a smart choice for protecting trailers of all kinds. If you want added peace of mind without complexity, this is an easy five-star product. ### ⭐⭐⭐⭐⭐ Solid Protection ,Total Peace of Mind! *by W***B on March 17, 2026* This Master Lock is an excellent product. It feels heavy-duty and secure, giving me way more confidence when I leave my RV at the campsite or in storage. The universal fit worked perfectly on my trailer coupler, and the black finish looks sleek while being weather-resistant. A small price to pay for such great security! ### ⭐⭐⭐⭐⭐ Perfect Fit and Great Peace of Mind *by S***A on December 17, 2025* This Master Lock fits my trailer perfectly and feels very secure. It was easy to install and solidly built. Once it’s on, I feel confident that it will help prevent my trailer from being stolen. Definitely gives me peace of mind and I would recommend it to anyone looking for a reliable trailer lock. ## 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.pl/products/7757162-black-universal-size-trailer-hitch-lock-trailer-coupler-lock-securing](https://www.desertcart.pl/products/7757162-black-universal-size-trailer-hitch-lock-trailer-coupler-lock-securing) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-04-23*