{"product_id":"trivisa-butterfly-cu-jm06-cu-14","title":"Trivisa Butterfly-CU JM06-CU-14 14C28N Blade Copper Handle Crossbar Lock Folding Knife","description":"\u003cp\u003eThe Trivisa Butterfly-CU JM06-CU-14 combines a practical clip-point blade with a distinctive copper handle for everyday carry and outdoor use. Its 14C28N stainless steel blade features a stonewashed finish and 60±2HRC hardness. Valued for corrosion resistance and easy sharpening, this steel offers dependable utility, though abrasive cutting may call for more frequent edge touch-ups. A ceramic ball bearing supports smooth opening, while the crossbar lock secures the blade during use. Measuring 6.81 inches overall, it has a 2.99-inch blade and closes to 3.77 inches. The blade is 0.12-inch thick and 0.96-inch wide. At 4.68 ounces, this folding knife is suited to EDC, hiking, camping, fishing, hunting, and outdoor tasks. Designed by the TRIVISA team, it balances compact dimensions with a substantial copper handle.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003e14C28N Blade Introduction\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/edcmall.cn\/collections\/14c28n\"\u003e14C28N\u003c\/a\u003e is a high-value budget-to-midrange stainless steel that excels in corrosion resistance and ease of sharpening, making it a low-maintenance workhorse for EDC and wet environments, but it falls short of premium steels in edge retention and requires more frequent touch-ups when cutting highly abrasive materials like cardboard.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eSPECIFICATIONS\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eDesigner:TRIVISA Team\u003cbr\u003eStyle:Clip Point\u003cbr\u003eBlade Material：14C28N Steel\u003cbr\u003eBlade Finished：Stonewash\u003cbr\u003eHandle Material: Copper\u003cbr\u003eLock Style:Crossbar lock\u003cbr\u003eHardness:60±2HRC\u003cbr\u003eBearing:Ceramic ball bearing\u003c\/p\u003e\n\u003cp\u003eSize:\u003cbr\u003eOverall length-6.81\"(173mm)\u003cbr\u003eBlade length-2.99\" (76mm)\u003cbr\u003eClosed length-3.77\"(96mm)\u003cbr\u003eBlade width-0.96''（25mm)\u003cbr\u003eBlade thickness-0.12''(3mm)\u003cbr\u003eNet Weight:4.68oz(132.7g)\u003c\/p\u003e\n\u003cp\u003eUsage:Outdoor survival,EDC,hunting,fishing, hiking and camping\u003c\/p\u003e\n\u003ch2\u003eTrivisa Butterfly-CU - Stonewash 14C28N Clip Point on a Solid Copper Handle\u003c\/h2\u003e\n\u003cp\u003eThe \u003ca href=\"\/zh-hans\/collections\/trivisa-knives\"\u003eTrivisa\u003c\/a\u003e Butterfly-CU JM06-CU-14 puts a stonewash \u003ca href=\"\/zh-hans\/collections\/14c28n\"\u003e14C28N\u003c\/a\u003e clip point on solid copper scales drilled with three through-holes, locked by an ambidextrous \u003ca href=\"\/zh-hans\/collections\/crossbar-lock-knives\"\u003ecrossbar lock\u003c\/a\u003e on ceramic bearings at 132.7 g. A patina \u003ca href=\"\/zh-hans\/collections\/folding-knives\"\u003efolding knife\u003c\/a\u003e that ages with you - more \u003ca href=\"\/zh-hans\/collections\/edc-all-products\"\u003eEDC gear\u003c\/a\u003e at EDCMALL.\u003c\/p\u003e\n\u003ch2\u003eCopper Scales, Stainless Blade - A Knife That Ages Gracefully\u003c\/h2\u003e\n\u003cp\u003eThe Butterfly-CU is 2.99 inches of Sandvik 14C28N at 60+\/-2 HRC - corrosion proof, chip resistant and easy to sharpen - mounted on genuine solid copper scales. Copper is the liveliest handle material there is: it starts mirror-bright and darkens through bronze to deep patina with every carry, and every knife's pattern ends up unique. Three round through-holes cut weight and give the Butterfly its identity, while a rope hole at the rear takes a lanyard or pull cord. The clip point keeps a fine, piercing tip with plenty of belly behind it for slicing. Compare 14C28N with \u003ca href=\"\/zh-hans\/collections\/d2\"\u003eD2\u003c\/a\u003e, \u003ca href=\"\/zh-hans\/collections\/nitro-v\"\u003eNitro-V\u003c\/a\u003e and \u003ca href=\"\/zh-hans\/collections\/m390\"\u003eM390\u003c\/a\u003e below.\u003c\/p\u003e\n\u003ch2\u003eWhy the Trivisa Butterfly-CU Belongs in Your Pocket\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e2.99 inch (76 mm) Sandvik 14C28N clip point at 60+\/-2 HRC on 3 mm stock.\u003c\/li\u003e\n\u003cli\u003eStonewash finish that hides scratches and kills glare.\u003c\/li\u003e\n\u003cli\u003eSolid copper scales with a living-finish patina that darkens with handling.\u003c\/li\u003e\n\u003cli\u003eThree through-holes plus a rope hole - weight relief, grip and lanyard options.\u003c\/li\u003e\n\u003cli\u003eAmbidextrous crossbar lock on ceramic ball bearings.\u003c\/li\u003e\n\u003cli\u003e132.7 g of solid metal - dense, satisfying heft that reads quality in hand.\u003c\/li\u003e\n\u003cli\u003eFine clip-point tip with a deep belly for slicing and pierce work.\u003c\/li\u003e\n\u003cli\u003eSwedged spine and green accent hardware for a custom-shop look.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eBest Uses for the Butterfly-CU\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eEveryday carry for people who want a knife that changes character over years.\u003c\/li\u003e\n\u003cli\u003eKitchen and picnic duty - stainless blade plus naturally antimicrobial copper.\u003c\/li\u003e\n\u003cli\u003eOutdoor tasks where a lanyard hole and a dense handle earn their keep.\u003c\/li\u003e\n\u003cli\u003eGift giving - copper patina makes every knife one of a kind.\u003c\/li\u003e\n\u003cli\u003eCollectors pairing a workhorse 14C28N edge with a premium handle material.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill the copper handle tarnish?\u003c\/strong\u003e\u003cbr\u003eYes - copper patinas from bright to warm bronze with air, sweat and use. It is the material's nature, not a defect; wax or polish if you prefer the shine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat steel is the blade?\u003c\/strong\u003e\u003cbr\u003eSandvik 14C28N stainless at 60+\/-2 HRC with a stonewash finish - corrosion resistant, chip resistant and easy to sharpen.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the crossbar lock work?\u003c\/strong\u003e\u003cbr\u003eA spring-loaded bar wedges behind the blade tang when open. Pull the bar back to release; fingers stay out of the blade path and it works from either hand.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are the three holes for?\u003c\/strong\u003e\u003cbr\u003eThey cut weight from the dense copper, index your fingers for grip, and give the Butterfly its signature look; the rear rope hole takes a lanyard.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it heavy?\u003c\/strong\u003e\u003cbr\u003e132.7 g (4.68 oz) - solid copper is dense. Carry it if you enjoy weighty, quality-feeling tools; skip it if you count grams.\u003c\/p\u003e\n\u003ch3\u003eSandvik 14C28N vs. Common Pocket Knife Steels\u003c\/h3\u003e\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSteel\u003c\/th\u003e\n\u003cth\u003eTypical HRC\u003c\/th\u003e\n\u003cth\u003eEdge Retention\u003c\/th\u003e\n\u003cth\u003eCorrosion Resistance\u003c\/th\u003e\n\u003cth\u003eToughness\u003c\/th\u003e\n\u003cth\u003eSharpening Ease\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e14C28N (this knife)\u003c\/td\u003e\n\u003ctd\u003e59-61\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003ctd\u003eVery Easy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNitro-V\u003c\/td\u003e\n\u003ctd\u003e59-61\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003ctd\u003eVery Good\u003c\/td\u003e\n\u003ctd\u003eBetter\u003c\/td\u003e\n\u003ctd\u003eEasy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e154CM\u003c\/td\u003e\n\u003ctd\u003e58-61\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003ctd\u003eVery Good\u003c\/td\u003e\n\u003ctd\u003eModerate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCPM-S35VN\u003c\/td\u003e\n\u003ctd\u003e58-60\u003c\/td\u003e\n\u003ctd\u003eVery Good\u003c\/td\u003e\n\u003ctd\u003eVery Good\u003c\/td\u003e\n\u003ctd\u003eBetter\u003c\/td\u003e\n\u003ctd\u003eModerate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eD2 Tool Steel\u003c\/td\u003e\n\u003ctd\u003e58-61\u003c\/td\u003e\n\u003ctd\u003eVery Good\u003c\/td\u003e\n\u003ctd\u003eFair\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003ctd\u003eModerate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e8Cr13MoV\u003c\/td\u003e\n\u003ctd\u003e57-59\u003c\/td\u003e\n\u003ctd\u003eFair\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003ctd\u003eVery Easy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cem\u003eSandvik 14C28N is a nitrogen-refined martensitic stainless that lands at 58-61 HRC in production heat treats. On a value folder it is the smart pick: corrosion resistance that survives wet weather and pocket sweat, a fine stable edge that refuses to chip, and sharpening so easy a few passes on a pocket stone restore the apex. The trade is raw wear resistance - expect more frequent touch-ups than a high-vanadium super steel under abrasive cardboard work. HRC figures are typical mill ranges, not a guarantee for any single blade.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003eGlossary of Key Terms\u003c\/h2\u003e\n\u003cstrong\u003eTrivisa\u003c\/strong\u003e\u003cbr\u003eA Chinese knife brand building premium-steel folders with a clean in-house design language.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eButterfly-CU\u003c\/strong\u003e\u003cbr\u003eTrivisa's solid-copper crossbar-lock folder: a 2.99 inch 14C28N clip point with three through-holes, a rope hole and ceramic bearings at 132.7 g.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSandvik 14C28N\u003c\/strong\u003e\u003cbr\u003eA nitrogen-alloyed martensitic stainless at 58-61 HRC. Corrosion-proof, fine-grained, hard to chip and famously easy to sharpen.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eClip Point\u003c\/strong\u003e\u003cbr\u003eA blade whose spine is 'clipped' down toward the tip, leaving a fine, sharp point with plenty of belly behind it for slicing.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eCopper Handle\u003c\/strong\u003e\u003cbr\u003eSolid copper scales with living-finish patina that darkens with handling; naturally antimicrobial and satisfyingly dense in the pocket.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eThrough-Hole Scales\u003c\/strong\u003e\u003cbr\u003eRound cut-outs drilled through the handle that cut weight, give the design its identity and double as finger indexing points.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eRope Hole\u003c\/strong\u003e\u003cbr\u003eA large drilled hole at the handle rear for a lanyard, cord loop or pull-through assist when working gloves or wet hands.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eCrossbar Lock\u003c\/strong\u003e\u003cbr\u003eA spring-loaded bar spanning the handle that wedges behind the blade tang. Fully ambidextrous, keeps fingers out of the closing path, and among the strongest folder locks built.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eCeramic Ball Bearings\u003c\/strong\u003e\u003cbr\u003eHardened ceramic balls around the pivot. The action stays glassy for years, and ceramic will not rust or flat-spot.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eStonewash Finish\u003c\/strong\u003e\u003cbr\u003eA tumbling process that beads the steel into a uniform matte grey, hiding carry scratches and killing glare far better than satin.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003e60+\/-2 HRC\u003c\/strong\u003e\u003cbr\u003eThe Rockwell C hardness band the blade is heat treated to: hard enough for long edge life, still honest to sharpen at home with patience.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eThumb Stud\u003c\/strong\u003e\u003cbr\u003eA small post on the blade spine that the thumb pushes to open the knife one-handed. Simple, snag-free and fully ambidextrous.\u003cbr\u003e\u003cbr\u003e\n\u003ch2\u003eWho Should Buy the Butterfly-CU\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCopper fans who want a real patina knife with a stainless workhorse blade.\u003c\/li\u003e\n\u003cli\u003eCollectors who want metal heft and through-hole design under $90.\u003c\/li\u003e\n\u003cli\u003eGift buyers - the patina story makes every piece unique.\u003c\/li\u003e\n\u003cli\u003eLeft-hand users - crossbar lock and thumb stud are fully ambidextrous.\u003c\/li\u003e\n\u003cli\u003eAnyone who wants a lanyard-ready handle for glove or marine use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho Should Skip It\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGram counters - 132.7 g of solid copper is deliberately dense.\u003c\/li\u003e\n\u003cli\u003eBuyers who hate changing finishes - copper will patina whether you like it or not.\u003c\/li\u003e\n\u003cli\u003eSalt-water abusers - the blade is stainless but the bare copper needs a wipe after marine use.\u003c\/li\u003e\n\u003cli\u003eHard prying - 3 mm stock is a slicer, not a lever.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCare \u0026amp; Maintenance\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eWipe the blade dry after every use; 14C28N is genuinely stainless, but pocket lint holds moisture against the steel.\u003c\/li\u003e\n\u003cli\u003eOne drop of light knife oil at the pivot monthly, then swing the blade a dozen times so oil reaches the ceramic bearing.\u003c\/li\u003e\n\u003cli\u003eTo close it, pull the crossbar lock back and swing the blade shut - keep fingers out of the blade path.\u003c\/li\u003e\n\u003cli\u003eExpect the copper scales to patina: they darken from mirror-bright to warm bronze over weeks. That is the material working, not a defect.\u003c\/li\u003e\n\u003cli\u003eSlow the patina with a drop of copper oil or wax on the scales; polish with a flitz cloth if you want the shine back.\u003c\/li\u003e\n\u003cli\u003eSharpen on a 1000-grit water stone or diamond plate at 15-18 degrees per side; 14C28N grinds fast and takes a keen edge in minutes.\u003c\/li\u003e\n\u003cli\u003eFlush the rope hole and the three through-holes with warm water if grit packs in, then dry the handle fully.\u003c\/li\u003e\n\u003cli\u003eCheck the pocket clip and body screws every month or two with the correct Torx driver.\u003c\/li\u003e\n\u003cli\u003eNever pry, twist or use the 3 mm blade as a screwdriver - the tip is a cutter, not a lever.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"Trivisa Butterfly-CU JM06-CU-14 14C28N Blade Copper Handle Crossbar Lock Folding Knife\",\n  \"sku\": \"Butterfly-CU\",\n  \"mpn\": \"Butterfly-CU\",\n  \"productID\": \"Butterfly-CU\",\n  \"description\": \"Trivisa Butterfly-CU JM06-CU-14 folding knife: 2.99 inch (76 mm) Sandvik 14C28N clip point blade at 60+\/-2 HRC with a stonewash finish on 3 mm stock, solid copper handle scales with three through-holes and a rope hole, ambidextrous crossbar lock, ceramic ball bearing pivot, thumb-stud opening, pocket clip, 132.7 g (4.68 oz), 6.81 inch (173 mm) overall. 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