{"product_id":"master-lock-trailer-hitch-coupler-lock-379atpy-black-keyed-zinc-security-fits-1-7-8-2-most-2-5-16-couplers","title":"Master Lock Trailer Hitch Coupler Lock 379ATPY Black — Keyed Zinc Security, Fits 1-7\/8″, 2″ \u0026 Most 2-5\/16″ Couplers","description":"\u003cp\u003e\u003cstrong\u003eThe Master Lock 379ATPY is a keyed trailer hitch coupler lock that secures 1-7\/8\", 2\" and most 2-5\/16\" couplers with a heavy-duty, pick- and pry-resistant mechanism.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eProtecting a trailer, RV or tow vehicle starts at the coupler; the Master Lock 379ATPY offers straightforward, durable security with a universal fit. Constructed of zinc to resist rust and corrosion and backed by Master Lock’s limited lifetime warranty, this compact lock ships with two keys and installs without tools to give owners quick, reliable deterrence against theft.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this lock fit different trailer coupler sizes?\u003c\/h3\u003e\n\u003cp\u003eThe 379ATPY uses a universal insert and locking shank engineered to engage the common coupler diameters used on trailers and RVs. It’s shaped to slide into the coupler cavity and lock in place, preventing the latch from closing around a ball or from being removed.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with 1-7\/8\" (48 mm), 2\" (51 mm), and most 2-5\/16\" (59 mm) couplers\u003c\/li\u003e\n  \u003cli\u003eSingle unit design fits a wide range of standard couplers without adapters\u003c\/li\u003e\n  \u003cli\u003eSimple push-and-lock installation—no tools required\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat makes the locking mechanism secure against tampering?\u003c\/h3\u003e\n\u003cp\u003eMaster Lock engineered the 379ATPY to resist common attack methods like picking and prying by using a reinforced locking mechanism and robust internal components. While no lock is invulnerable, this model raises the time and effort required to defeat the coupler, making theft less likely.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAdvanced internal tumblers and reinforced housing reduce picking risk\u003c\/li\u003e\n  \u003cli\u003eZinc construction adds structural strength and corrosion resistance\u003c\/li\u003e\n  \u003cli\u003eLow-profile shape minimizes leverage points for pry tools\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow weatherproof and durable is the Master Lock 379ATPY?\u003c\/h3\u003e\n\u003cp\u003eThe lock is built from zinc with finishes designed to stand up to outdoor storage and seasonal use. The materials and design limit rust and wear so the lock stays functional through rain, salt air and road grime.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eZinc body resists corrosion for longer outdoor life\u003c\/li\u003e\n  \u003cli\u003eSealed components reduce moisture intrusion into the lock core\u003c\/li\u003e\n  \u003cli\u003eIncludes two keys so you have a spare for routine use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan I trust the warranty and support for this product?\u003c\/h3\u003e\n\u003cp\u003eMaster Lock includes a limited lifetime warranty that covers defects in materials and workmanship under normal use. If the lock fails due to a covered defect, Master Lock’s support and warranty process provides repair or replacement options consistent with the warranty terms.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLimited lifetime warranty from an established security brand\u003c\/li\u003e\n  \u003cli\u003eCustomer support available through Master Lock for warranty assistance\u003c\/li\u003e\n  \u003cli\u003eWarranty covers manufacturing defects, not damage from misuse\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Master Lock 379ATPY is ideal for trailer owners, RV enthusiasts and anyone who frequently parks or stores a trailer, camper or utility trailer and wants a simple, durable deterrent at the coupler. It’s best for users who need a universal, no-tools solution built to resist weather and typical tampering, and who value a trusted brand warranty and an included spare key.\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 2-5\/16\" coupler?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes—the 379ATPY fits most 2-5\/16\" (59 mm) couplers as well as 1-7\/8\" and 2\" sizes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the lock come with replacement keys?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The package includes two keys; additional keys require contacting Master Lock support for duplicates.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Master Lock","offers":[{"title":"Default Title","offer_id":48079806693534,"sku":"B000L9QRE8","price":66.53,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/master-lock-379atpy-front-view.jpg?v=1785771247","url":"https:\/\/northtrailauto.ca\/products\/master-lock-trailer-hitch-coupler-lock-379atpy-black-keyed-zinc-security-fits-1-7-8-2-most-2-5-16-couplers","provider":"North Trail Auto","version":"1.0","type":"link"}