--- product_id: 43811787 title: "Master Lock Trailer Lock, Trailer Hitch Lock fits 1-7/8\",2\" & 2-5/16\" Red" brand: "master lock" price: "934 kr" currency: NOK in_stock: true category: "Master Lock" url: https://www.desertcart.no/products/43811787-master-lock-trailer-lock-trailer-hitch-lock-fits-1-7 store_origin: NO region: Norway --- # Advanced pick & pry resistant lock Universal fit for 3 coupler sizes Rust & corrosion resistant alloy steel Master Lock Trailer Lock, Trailer Hitch Lock fits 1-7/8",2" & 2-5/16" Red **Brand:** master lock **Price:** 934 kr **Availability:** ✅ In Stock ## Summary > 🔐 Lock in your trailer’s safety with confidence and style! ## Quick Answers - **What is this?** Master Lock Trailer Lock, Trailer Hitch Lock fits 1-7/8",2" & 2-5/16" Red by master lock - **How much does it cost?** 934 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.no](https://www.desertcart.no/products/43811787-master-lock-trailer-lock-trailer-hitch-lock-fits-1-7) ## 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 - • **Built to Outlast:** Crafted from durable alloy steel that resists rust and corrosion for long-term protection. - • **Pick & Pry Proof:** Advanced locking mechanism engineered to withstand tampering attempts. - • **Bold Red Deterrent:** Bright red finish sends a clear 'hands off' message to potential thieves. - • **Lifetime Peace of Mind:** Backed by Master Lock’s Limited Lifetime Warranty — security that lasts a lifetime. - • **Universal Fit, Zero Hassle:** Fits 1-7/8", 2", and 2-5/16" couplers for seamless security across trailers. ## Overview The Master Lock 389DAT Trailer Coupler Lock offers universal compatibility with 1-7/8", 2", and 2-5/16" couplers, featuring a bright red, corrosion-resistant alloy steel body and an advanced locking mechanism designed to resist picking and prying. Trusted by professionals and backed by a Limited Lifetime Warranty, it’s the ultimate security upgrade for your trailer. ## Description The Master Lock No. 389DAT features a universal trailer coupler lock, designed to fit most 1-7/8in (48mm), 2in (51mm) and, 2-5/16in (59mm) couplers. The advanced locking mechanism provides resistance to picking and prying. Built for shoppers looking for a trailer hitch lock that is simple, visible, and compatible with common coupler sizes, this lock helps secure utility trailers, enclosed trailers, RVs, campers, boat trailers, and other towable equipment. This universal design fits 1-7/8 in. (48 mm), 2 in. (51 mm), and most 2-5/16 in. (59 mm) trailer couplers, covering many of the most common towing applications. The coupler lock helps add protection at home, on the road, at a campsite, near a marina, or on a jobsite where trailers may sit unattended between uses. The advanced locking mechanism is engineered to resist picking and prying, giving trailer owners a reliable way to help deter theft and unwanted hitching. Its zinc construction helps resist rust and corrosion for outdoor performance, making it a strong choice for anyone searching for a boat trailer lock, camper hitch lock, RV hitch lock, trailer tongue lock, or lock for trailer hitch security. Compact and easy to keep with your trailer hitch accessories, this keyed trailer coupler lock includes two keys so you can store a spare where it is convenient. Whether you are securing a trailer between weekend trips, protecting equipment during seasonal storage, or adding a visible theft deterrent to your towing setup, the Master Lock 389DAT offers dependable trailer security from a brand known for trusted locking products.The Limited Lifetime Warranty provides peace of mind from a brand you can trust. ## Features - Coupler Lock,Universal - Bright red finish discourages thief's from messing with your trailer - Advanced locking mechanism resists picking and prying - Resists rust and corrosion; Simple installation and removal ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01MYCT0LG | | Additional Features | Advanced locking mechanism, Resists picking and prying, Rekeyable | | Best Sellers Rank | #3,592 in Automotive ( See Top 100 in Automotive ) #10 in Towing Hitch Locks | | Brand | Master Lock | | Brand Name | Master Lock | | Color | Red | | Control Method | Touch | | Controller Type | Hand Control | | Customer Reviews | 4.7 out of 5 stars 17,447 Reviews | | Finish Types | Painted | | Global Trade Identification Number | 00071649263019 | | Included Components | Coupler Lock | | Item Dimensions | 3.6 x 7.6 x 6.7 inches | | Item Highlight | Universal hitch lock for Boat, RV, Utility Boat, Camper Trailers. Secure from theft at jobsites, driveway or boat launch | | Item Type Name | Automotive Towing | | Item Weight | 16 ounces | | Item dimensions L x W x H | 3.6 x 7.6 x 6.7 inches | | Lock Type | Key Lock | | Manufacturer | Master Lock | | Manufacturer Part Number | 389DAT | | Manufacturer Warranty Description | MASTER LOCK PRODUCT WARRANTY Limited Lifetime Warranty Master Lock Company LLC (“Master Lock”) grants the following warranty: If this product or any part of the product fails due to a defect in materials or workmanship at any time during the life of the product, Master Lock will, at its own discretion, repair or replace the product or part free of charge. Simply contact Master Lock at www.masterlo… | | Material | Alloy Steel | | Material Type | Alloy Steel | | Model Name | Trailer Lock | | Model Number | 379ATPY | | Number of Items | 1 | | Number of Pieces | 1 | | Recommended Uses For Product | securing trailers | | Special Feature | Advanced locking mechanism, Resists picking and prying, Rekeyable | | Style Name | Master Lock | | UPC | 071649263019 | | Unit Count | 1 Count | ## Product Details - **Brand:** Master Lock - **Item dimensions L x W x H:** 3.6 x 7.6 x 6.7 inches - **Lock Type:** Key Lock - **Material:** Alloy Steel - **Special Feature:** Not_Performance_Used ## Images ![Master Lock Trailer Lock, Trailer Hitch Lock fits 1-7/8",2" & 2-5/16" Red - Image 1](https://m.media-amazon.com/images/I/51j0ElX2eTL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Which is better, this or a boot for a trailer?** A: This is pretty good, fits any receiver and is sturdy. I also have a boot, one that clamps on each side of the wheel, so much easier to use than the so called Denver Boot. If someone wants your trailer bad enough locks and boots won't make any difference, but it sure will slow them down. **Q: Are the keys universal or unique to each lock?** A: The keys are unique to the lock. I ordered the 4 pack. The keys for one lock only works on that lock. **Q: How many keys does this come with?** A: That would be two **Q: Will this lock work on a gooseneck trailer 2 5/16 hitch receiver?** A: Yes, it works on mine, and the description of it states the sizes it will fit. ## Frequently Bought Together - Master Lock - Universal Size Fits 1-7/8", 2", and 2-5/16" Couplers - Trailer Locks #389DAT - CZC AUTO Black Trailer Hitch Coupler Lock, Dia 1/4 Inch, 3/4 Inch Span for Tow Boat RV Truck Car's Coupler (1 Pack, Black) - CARTMAN Heavy Duty Trailer Lock Wheel Clamp, Universal Security Tire Lock, Adjustable Anti Theft Lock for Trailers SUV Boats ATVs Motorcycles Golf Cart --- ## 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.no/products/43811787-master-lock-trailer-lock-trailer-hitch-lock-fits-1-7](https://www.desertcart.no/products/43811787-master-lock-trailer-lock-trailer-hitch-lock-fits-1-7) --- *Product available on Desertcart Norway* *Store origin: NO* *Last updated: 2026-09-30*