--- product_id: 43811787 title: "Master Lock Trailer Coupler Lock, Universal Size Fits 1-7/8\", 2\", and 2-5/16\", 389DAT" brand: "master lock" price: "₹ 6522" currency: INR in_stock: true reviews_count: 13 category: "Master Lock" url: https://www.desertcart.in/products/43811787-master-lock-trailer-coupler-lock-universal-size-fits-1-7 store_origin: IN region: India --- # Advanced pick & pry resistant lock Universal fit for 3 coupler sizes Rust & corrosion resistant alloy steel Master Lock Trailer Coupler Lock, Universal Size Fits 1-7/8", 2", and 2-5/16", 389DAT **Brand:** master lock **Price:** ₹ 6522 **Availability:** ✅ In Stock ## Summary > 🔐 Lock in your trailer’s safety and leave thieves locked out! ## Quick Answers - **What is this?** Master Lock Trailer Coupler Lock, Universal Size Fits 1-7/8", 2", and 2-5/16", 389DAT by master lock - **How much does it cost?** ₹ 6522 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.in](https://www.desertcart.in/products/43811787-master-lock-trailer-coupler-lock-universal-size-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:** Durable alloy steel resists rust and corrosion for long-term protection - • **Next-Level Security:** Advanced locking mechanism engineered to resist picking and prying - • **Red Alert for Thieves:** Bright red finish acts as a bold visual deterrent - • **Hassle-Free Peace of Mind:** Simple installation plus a Limited Lifetime Warranty from Master Lock - • **Universal Fit, Zero Guesswork:** Fits 1-7/8", 2", and 2-5/16" trailer couplers seamlessly ## Overview The Master Lock 389DAT Trailer Coupler Lock offers universal compatibility with the three most common coupler sizes, featuring a bright red, rust-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 combines high security with easy installation to protect your trailer from theft. ## 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. 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 | #8,029 in Automotive ( See Top 100 in Automotive ) #26 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 17,417 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 Type Name | Automotive Towing | | Item Weight | 1 Pounds | | 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 Coupler Lock | | Model Number | 379ATPY | | 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 | 1.0 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:** Advanced locking mechanism, Resists picking and prying, Rekeyable ## Images ![Master Lock Trailer Coupler Lock, Universal Size Fits 1-7/8", 2", and 2-5/16", 389DAT - Image 1](https://m.media-amazon.com/images/I/51j0ElX2eTL.jpg) ![Master Lock Trailer Coupler Lock, Universal Size Fits 1-7/8", 2", and 2-5/16", 389DAT - Image 2](https://m.media-amazon.com/images/I/61ZBFNGmumL.jpg) ![Master Lock Trailer Coupler Lock, Universal Size Fits 1-7/8", 2", and 2-5/16", 389DAT - Image 3](https://m.media-amazon.com/images/I/71nmXREL0DL.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. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by J***S on March 2, 2026* ### ⭐⭐⭐⭐⭐ Review *by P***P on April 3, 2026* ### ⭐⭐⭐⭐⭐ Review *by J***E on February 28, 2026* ## 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.in/products/43811787-master-lock-trailer-coupler-lock-universal-size-fits-1-7](https://www.desertcart.in/products/43811787-master-lock-trailer-coupler-lock-universal-size-fits-1-7) --- *Product available on Desertcart India* *Store origin: IN* *Last updated: 2026-05-04*