Trivisa Butterfly-CU JM06-CU-14 14C28N Blade Copper Handle Crossbar Lock Folding Knife

The 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.

14C28N Blade Introduction

14C28N 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.

SPECIFICATIONS

Designer:TRIVISA Team
Style:Clip Point
Blade Material：14C28N Steel
Blade Finished：Stonewash
Handle Material: Copper
Lock Style:Crossbar lock
Hardness:60±2HRC
Bearing:Ceramic ball bearing

Size:
Overall length-6.81"(173mm)
Blade length-2.99" (76mm)
Closed length-3.77"(96mm)
Blade width-0.96''（25mm)
Blade thickness-0.12''(3mm)
Net Weight:4.68oz(132.7g)

Usage:Outdoor survival,EDC,hunting,fishing, hiking and camping

Trivisa Butterfly-CU - Stonewash 14C28N Clip Point on a Solid Copper Handle

The Trivisa Butterfly-CU JM06-CU-14 puts a stonewash 14C28N clip point on solid copper scales drilled with three through-holes, locked by an ambidextrous crossbar lock on ceramic bearings at 132.7 g. A patina folding knife that ages with you - more EDC gear at EDCMALL.

Copper Scales, Stainless Blade - A Knife That Ages Gracefully

The 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 D2, Nitro-V and M390 below.

Why the Trivisa Butterfly-CU Belongs in Your Pocket

• 2.99 inch (76 mm) Sandvik 14C28N clip point at 60+/-2 HRC on 3 mm stock.
• Stonewash finish that hides scratches and kills glare.
• Solid copper scales with a living-finish patina that darkens with handling.
• Three through-holes plus a rope hole - weight relief, grip and lanyard options.
• Ambidextrous crossbar lock on ceramic ball bearings.
• 132.7 g of solid metal - dense, satisfying heft that reads quality in hand.
• Fine clip-point tip with a deep belly for slicing and pierce work.
• Swedged spine and green accent hardware for a custom-shop look.

Best Uses for the Butterfly-CU

• Everyday carry for people who want a knife that changes character over years.
• Kitchen and picnic duty - stainless blade plus naturally antimicrobial copper.
• Outdoor tasks where a lanyard hole and a dense handle earn their keep.
• Gift giving - copper patina makes every knife one of a kind.
• Collectors pairing a workhorse 14C28N edge with a premium handle material.

Frequently Asked Questions

Will the copper handle tarnish?
Yes - 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.

What steel is the blade?
Sandvik 14C28N stainless at 60+/-2 HRC with a stonewash finish - corrosion resistant, chip resistant and easy to sharpen.

How does the crossbar lock work?
A 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.

What are the three holes for?
They 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.

Is it heavy?
132.7 g (4.68 oz) - solid copper is dense. Carry it if you enjoy weighty, quality-feeling tools; skip it if you count grams.

Sandvik 14C28N vs. Common Pocket Knife Steels

Steel	Typical HRC	Edge Retention	Corrosion Resistance	Toughness	Sharpening Ease
14C28N (this knife)	59-61	Good	Excellent	Good	Very Easy
Nitro-V	59-61	Good	Very Good	Better	Easy
154CM	58-61	Good	Good	Very Good	Moderate
CPM-S35VN	58-60	Very Good	Very Good	Better	Moderate
D2 Tool Steel	58-61	Very Good	Fair	Good	Moderate
8Cr13MoV	57-59	Fair	Good	Good	Very Easy

Sandvik 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.

Glossary of Key Terms

Trivisa
A Chinese knife brand building premium-steel folders with a clean in-house design language.

Butterfly-CU
Trivisa'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.

Sandvik 14C28N
A nitrogen-alloyed martensitic stainless at 58-61 HRC. Corrosion-proof, fine-grained, hard to chip and famously easy to sharpen.

Clip Point
A blade whose spine is 'clipped' down toward the tip, leaving a fine, sharp point with plenty of belly behind it for slicing.

Copper Handle
Solid copper scales with living-finish patina that darkens with handling; naturally antimicrobial and satisfyingly dense in the pocket.

Through-Hole Scales
Round cut-outs drilled through the handle that cut weight, give the design its identity and double as finger indexing points.

Rope Hole
A large drilled hole at the handle rear for a lanyard, cord loop or pull-through assist when working gloves or wet hands.

Crossbar Lock
A 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.

Ceramic Ball Bearings
Hardened ceramic balls around the pivot. The action stays glassy for years, and ceramic will not rust or flat-spot.

Stonewash Finish
A tumbling process that beads the steel into a uniform matte grey, hiding carry scratches and killing glare far better than satin.

60+/-2 HRC
The Rockwell C hardness band the blade is heat treated to: hard enough for long edge life, still honest to sharpen at home with patience.

Thumb Stud
A small post on the blade spine that the thumb pushes to open the knife one-handed. Simple, snag-free and fully ambidextrous.

Who Should Buy the Butterfly-CU

• Copper fans who want a real patina knife with a stainless workhorse blade.
• Collectors who want metal heft and through-hole design under $90.
• Gift buyers - the patina story makes every piece unique.
• Left-hand users - crossbar lock and thumb stud are fully ambidextrous.
• Anyone who wants a lanyard-ready handle for glove or marine use.

Who Should Skip It

• Gram counters - 132.7 g of solid copper is deliberately dense.
• Buyers who hate changing finishes - copper will patina whether you like it or not.
• Salt-water abusers - the blade is stainless but the bare copper needs a wipe after marine use.
• Hard prying - 3 mm stock is a slicer, not a lever.

Care & Maintenance

• Wipe the blade dry after every use; 14C28N is genuinely stainless, but pocket lint holds moisture against the steel.
• One drop of light knife oil at the pivot monthly, then swing the blade a dozen times so oil reaches the ceramic bearing.
• To close it, pull the crossbar lock back and swing the blade shut - keep fingers out of the blade path.
• Expect the copper scales to patina: they darken from mirror-bright to warm bronze over weeks. That is the material working, not a defect.
• Slow the patina with a drop of copper oil or wax on the scales; polish with a flitz cloth if you want the shine back.
• Sharpen 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.
• Flush the rope hole and the three through-holes with warm water if grit packs in, then dry the handle fully.
• Check the pocket clip and body screws every month or two with the correct Torx driver.
• Never pry, twist or use the 3 mm blade as a screwdriver - the tip is a cutter, not a lever.