{"product_id":"master-lock-pro-series-hidden-shackle-padlock-keyed-alike-6271nka-1","title":"Master Lock Pro Series Hidden Shackle Padlock Keyed Alike 6271NKA-1","description":"\u003cp\u003eIn this review the Master Lock Pro Series Hidden Shackle Padlock keyed alike 6271NKA-1 is evaluated as a heavy-duty option for commercial and industrial security. The bottom line: this single keyed alike lock with two keys is best for users who need a corrosion-resistant, hard-to-cut padlock for trailers, gates, vending machines and other exposed applications where physical toughness and resistance to bumping are priorities. The lock's BumpStop Advanced Cylinder Technology and fully shielded boron alloy shackle are the single biggest reasons to consider it for securing valuable equipment.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBumpStop Advanced Cylinder Technology:\u003c\/strong\u003e Prevents lock bumping by blocking transfer of force from a bump key, keeping the cylinder from rotating during an attack.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardened diecast zinc body:\u003c\/strong\u003e Offers durable corrosion resistance for outdoor and transportation use where exposure is common.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh security 6-pin cylinder:\u003c\/strong\u003e Provides increased pick resistance and allows the cylinder to be removed for replacement or repinning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully shielded boron alloy shackle:\u003c\/strong\u003e Resists cutting and prying better than standard shackles, improving physical security against bolt cutters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKeyed alike set:\u003c\/strong\u003e This listing is for one lock keyed alike with two keys included, simplifying access when multiple locks share the same key.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCommercial grade design:\u003c\/strong\u003e Built for industrial and transportation applications such as enclosed trailers, gates, and vending equipment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe Master Lock Pro Series Hidden Shackle Padlock is for fleet managers, contractors, and owners of enclosed trailers or industrial equipment who need a rugged padlock that resists cutting, prying and bumping. It suits outdoor use where a corrosion-resistant body and hardened shackle are important.\u003c\/p\u003e\n\u003cp\u003eThose who need an inexpensive, low-security solution or a lock with advanced electronic features should look elsewhere. Also, buyers who require multiple keyed-alike locks in one purchase should confirm keying expectations up front, since some customers report mixed experiences with keyed-alike consistency.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSolid, heavy construction that customers describe as built like a tank for trailer and gate security.\u003c\/li\u003e\n\u003cli\u003eBumpStop cylinder technology reduces the emerging threat of lock bumping for better anti-tamper protection.\u003c\/li\u003e\n\u003cli\u003eRemovable cylinder and 6-pin design improve pick resistance and allow rekeying or replacement.\u003c\/li\u003e\n\u003cli\u003eShielded boron alloy shackle offers high resistance to bolt cutters and prying attacks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSome customers report occasional issues with keys sticking or mixed experiences on keyed-alike batches, so expect to verify key operation on receipt.\u003c\/li\u003e\n\u003cli\u003eHeavier, commercial-grade construction makes the lock bulkier than light-duty consumer padlocks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eMaster Lock Pro Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e6271NKA-1 (keyed alike, 1 lock)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShackle diameter\u003c\/td\u003e\n\u003ctd\u003e3\/8 in (10mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShackle clearance\u003c\/td\u003e\n\u003ctd\u003e19\/32 in (15mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody width\u003c\/td\u003e\n\u003ctd\u003e2-7\/8 in (73mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody height\u003c\/td\u003e\n\u003ctd\u003e1-23\/32 in (44mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKeys included\u003c\/td\u003e\n\u003ctd\u003e2 keys; keyed alike\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Master Lock Pro Series Hidden Shackle Padlock 6271NKA-1 is a solid choice for users who need commercial-grade physical security with bumping protection and a bolt cutter tough shackle. It represents good value for trailers, gates and industrial applications, though buyers should confirm keyed-alike expectations and accept a heavier, more robust lock body.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this lock resist bumping?\u003c\/strong\u003e\u003cbr\u003eYes. It uses BumpStop Advanced Cylinder Technology designed to prevent the transfer of force from a bump key and block cylinder rotation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the shackle cut resistant?\u003c\/strong\u003e\u003cbr\u003eThe shackle is hardened boron alloy and fully shielded, providing high resistance to bolt cutters and prying attempts.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow many keys come with the lock?\u003c\/strong\u003e\u003cbr\u003eThis listing includes two keys and the lock is sold keyed alike as described, though some customers report variability and should verify key operation on delivery.\u003c\/p\u003e","brand":"Master Lock","offers":[{"title":"Default Title","offer_id":48247912005851,"sku":"B006S3JKJA","price":36.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61tJ7AF-4YL._AC_SL1000.jpg?v=1770965170","url":"https:\/\/gearmusthave.com\/products\/master-lock-pro-series-hidden-shackle-padlock-keyed-alike-6271nka-1","provider":"GearMustHave","version":"1.0","type":"link"}