--- product_id: 7757162 title: "Master Lock Trailer Lock, Black Trailer Tongue Lock 379ATPY" brand: "master lock" price: "€ 93.82" currency: EUR in_stock: true category: "Master Lock" url: https://www.desertcart.sk/products/7757162-master-lock-trailer-lock-black-trailer-tongue-lock-379atpy store_origin: SK region: Slovakia --- # Fits 3 coupler sizes (48-59mm) Durable zinc rust-proof build Advanced pick & pry resistance Master Lock Trailer Lock, Black Trailer Tongue Lock 379ATPY **Brand:** master lock **Price:** € 93.82 **Availability:** ✅ In Stock ## Summary > 🔐 Lock in your peace of mind—because your trailer deserves the best. ## Quick Answers - **What is this?** Master Lock Trailer Lock, Black Trailer Tongue Lock 379ATPY by master lock - **How much does it cost?** € 93.82 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/7757162-master-lock-trailer-lock-black-trailer-tongue-lock-379atpy) ## 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, keeping your trailer invincible. - • **Built to Brave the Elements:** Zinc construction ensures rust and corrosion resistance, perfect for all-weather protection. - • **Ready to Use Out of the Box:** Includes two keys and a compact, portable design for effortless locking on the go. - • **Universal Fit for Ultimate Security:** Seamlessly locks 1-7/8", 2", and 2-5/16" trailer couplers—one lock to rule them all. - • **Trusted Brand with Lifetime Peace of Mind:** Backed by Master Lock’s Limited Lifetime Warranty—security you can count on. ## Overview The Master Lock 379ATPY universal trailer hitch coupler lock fits three common coupler sizes (48mm, 51mm, 59mm) and features an advanced locking mechanism that resists picking and prying. Constructed from durable zinc to prevent rust and corrosion, it’s designed for vehicles, trailers, and RVs. This compact, portable lock includes two keys and is backed by a Limited Lifetime Warranty from a trusted industry leader. ## 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 | #2,630 in Automotive ( See Top 100 in Automotive ) #8 in Towing Hitch Locks | | Brand Name | Master Lock | | Color | Black | | Control Method | Touch | | Controller Type | Hand Control | | Customer Reviews | 4.6 4.6 out of 5 stars (5,979) | | 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 | 16 ounces | | Lock Type | Key Lock | | Manufacturer | Master Lock | | Manufacturer Part Number | 379ATPY | | Manufacturer Warranty Description | 1 year manufacturer | | Material Type | Zinc | | Model Name | Universal Towing Coupler Lock, Steel | | Model Number | 379ATPY | | Number of Items | 1 | | Number of Packs | 1 | | Number of Pieces | 1 | | Recommended Uses For Product | vehicles, trailers, RVs | | Shape | Rectangular | | Style Name | Trailer Hitch Lock | | UPC | 071649229220 | | Unit Count | 1 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 Trailer Lock, Black Trailer Tongue Lock 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. ## 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.sk/products/7757162-master-lock-trailer-lock-black-trailer-tongue-lock-379atpy](https://www.desertcart.sk/products/7757162-master-lock-trailer-lock-black-trailer-tongue-lock-379atpy) --- *Product available on Desertcart Slovakia* *Store origin: SK* *Last updated: 2026-08-29*