{"product_id":"master-lock-universal-trailer-coupler-locks-2-pack-fits-1-7-8-2-2-5-16-red-corrosion-resistant","title":"Master Lock Universal Trailer Coupler Locks, 2-Pack (Fits 1-7\/8\"\/2\"\/2-5\/16\") Red, Corrosion-Resistant","description":"\u003cp\u003e\u003cstrong\u003eMaster Lock's #389DAT universal coupler locks are a two-pack of keyed-different security devices made to fit most 1-7\/8\", 2\", and 2-5\/16\" trailer couplers for on-trailer protection.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese coupler locks provide a straightforward physical barrier that helps prevent unauthorized hookups and discourages opportunistic thieves. Built to fit the common 48 mm (1-7\/8\"), 51 mm (2\"), and 59 mm (2-5\/16\") coupler sizes, the pair arrives keyed differently so each lock uses its own key. The locks combine a visible deterrent finish with an internal mechanism designed to resist picking and prying, plus corrosion-resistant materials for longer outdoor life.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this lock fit different trailer couplers?\u003c\/h3\u003e\n\u003cp\u003eThe #389DAT uses a universal shape and adjustable interface to match the most common coupler diameters without extra adapters. It slides into the coupler throat and secures across the opening so the trailer cannot be attached to a ball hitch while locked.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits 1-7\/8\" (48 mm), 2\" (51 mm) and 2-5\/16\" (59 mm) couplers.\u003c\/li\u003e\n  \u003cli\u003eSimple slide-and-lock installation with no tools required.\u003c\/li\u003e\n  \u003cli\u003eWorks with most standard trailer coupler designs.\u003c\/li\u003e\n  \u003cli\u003eSold as a two-pack with different keys for each lock.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat security features are built into these coupler locks?\u003c\/h3\u003e\n\u003cp\u003eMaster Lock engineered the internal locking components to resist common attacks such as picking and basic leverage attempts. The bright red finish increases visibility, which can deter tampering before it starts.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAdvanced locking mechanism to make picking more difficult.\u003c\/li\u003e\n  \u003cli\u003eSolid construction that resists basic prying forces.\u003c\/li\u003e\n  \u003cli\u003eHigh-visibility red finish discourages casual interference.\u003c\/li\u003e\n  \u003cli\u003eDifferently keyed pair reduces risk if one key is copied or lost.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill these locks hold up outdoors and in salty conditions?\u003c\/h3\u003e\n\u003cp\u003eMaterials and coatings were selected to slow rust and corrosion so the locks remain functional when left on trailers. Routine care—wiping off road salt and lubricating the lock mechanism occasionally—extends service life even further.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCorrosion-resistant finish to resist weather exposure.\u003c\/li\u003e\n  \u003cli\u003eSealed components reduce internal moisture intrusion.\u003c\/li\u003e\n  \u003cli\u003eEasy to clean after wet or salty use; occasional lubrication recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow easy are they to install and carry?\u003c\/h3\u003e\n\u003cp\u003eInstallation takes seconds: slide the lock into the coupler opening and close the mechanism. The compact, lightweight form keeps the locks portable so you can store them in the vehicle or on-board when not in use.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTool-free installation and removal in moments.\u003c\/li\u003e\n  \u003cli\u003eCompact size fits in glove compartments or tool boxes.\u003c\/li\u003e\n  \u003cli\u003eTwo keys included for each lock; keys are not identical between the pair.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Owners of small trailers, utility trailers, boat trailers, and other towable equipment who want a visible, low-effort way to block unauthorized connections. These Master Lock #389DAT coupler locks suit anyone who prefers a universal, weather-resistant option that fits the most common coupler sizes and is quick to use when loading, parking, or storing a trailer.\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: Do these locks come keyed alike?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. The two locks in this pack are keyed differently; each lock has its own unique key.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can the #389DAT fit my 2\" trailer coupler?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The design fits 1-7\/8\", 2\", and 2-5\/16\" (48–59 mm) standard couplers.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Master Lock","offers":[{"title":"Default Title","offer_id":48079839101086,"sku":"B07C5JT375","price":105.97,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/master-lock-front-view-coupler-lock.jpg?v=1785772322","url":"https:\/\/northtrailauto.ca\/products\/master-lock-universal-trailer-coupler-locks-2-pack-fits-1-7-8-2-2-5-16-red-corrosion-resistant","provider":"North Trail Auto","version":"1.0","type":"link"}