{"product_id":"master-lock-trailer-coupler-lock-389dat-universal-1-7-8-2-5-16-red-visible-tamper-deterrent","title":"Master Lock Trailer Coupler Lock 389DAT Universal 1-7\/8\"–2-5\/16\" Red, Visible Tamper-Deterrent","description":"\u003cp\u003e\u003cstrong\u003eThe Master Lock 389DAT is a universal trailer coupler lock engineered to secure 1-7\/8\", 2\" and 2-5\/16\" couplers with a visible, tamper-deterring design.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eWhether you're parking a utility trailer, boat trailer or equipment hauler, the Master Lock 389DAT gives you an easy-to-install physical barrier that fits the most common coupler sizes. Built to stand up to daily exposure, its bright finish acts as a visual deterrent while the internal locking components are made to resist picking and prying. The unit is backed by Master Lock's Limited Lifetime Warranty for long-term ownership confidence.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this lock fit different trailer couplers?\u003c\/h3\u003e\n\u003cp\u003eThe 389DAT is made to accommodate the three most common coupler diameters—1-7\/8\" (48mm), 2\" (51mm) and 2-5\/16\" (59mm)—so one lock covers multiple trailers. Its adjustable design and streamlined shape slide into the coupler throat and lock in place without extra tools.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUniversal sizing for three standard coupler diameters\u003c\/li\u003e\n  \u003cli\u003eSimple slide-and-lock installation\u003c\/li\u003e\n  \u003cli\u003eWorks with ball-type couplers common on utility and boat trailers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat protects the lock from theft attempts and weather?\u003c\/h3\u003e\n\u003cp\u003eThe internal locking mechanism is engineered to resist common attacks like picking and prying, while the outer finish helps protect the body from rust and corrosion. The bright red color also provides a clear visual cue to would-be thieves, reducing casual tampering.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAdvanced internal mechanism deters picking and prying\u003c\/li\u003e\n  \u003cli\u003eCorrosion-resistant finish for outdoor durability\u003c\/li\u003e\n  \u003cli\u003eHigh-visibility color functions as a theft deterrent\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow easy is it to install and remove on a routine basis?\u003c\/h3\u003e\n\u003cp\u003eInstallation is tool-free: insert the lock into the coupler and engage the locking pin until it clicks. Removal is equally straightforward—unlock with the key and withdraw—so you can secure or release your trailer quickly at the dock, job site or storage lot.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTool-free installation and removal\u003c\/li\u003e\n  \u003cli\u003eQuick locking and unlocking with included keys\u003c\/li\u003e\n  \u003cli\u003eCompact design that stores easily when not in use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat kind of warranty and support does Master Lock provide?\u003c\/h3\u003e\n\u003cp\u003eMaster Lock stands behind the 389DAT with a Limited Lifetime Warranty that covers defects in materials and workmanship. This warranty gives you recourse if the lock fails under normal use, plus access to Master Lock customer support for product questions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLimited Lifetime Warranty for manufacturing defects\u003c\/li\u003e\n  \u003cli\u003eCustomer support through Master Lock for troubleshooting\u003c\/li\u003e\n  \u003cli\u003eReplacement guidance available if keys are lost (subject to policy)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: The Master Lock 389DAT is ideal for trailer owners who want a single, easy-to-use lock that fits the most common coupler sizes. It's a good choice for boat owners, contractors, landscapers and anyone who stores trailers in shared or public spaces and wants a visible, durable deterrent with reliable everyday function.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this lock fit my 2-inch trailer coupler?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The 389DAT is designed to fit 1-7\/8\", 2\" and 2-5\/16\" couplers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the lock weather resistant for outdoor storage?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It has a corrosion-resistant finish to withstand outdoor exposure.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Master Lock","offers":[{"title":"Default Title","offer_id":48086261923998,"sku":"B01MYCT0LG","price":49.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/master-lock-389dat-front-view.jpg?v=1785892593","url":"https:\/\/northtrailauto.ca\/products\/master-lock-trailer-coupler-lock-389dat-universal-1-7-8-2-5-16-red-visible-tamper-deterrent","provider":"North Trail Auto","version":"1.0","type":"link"}