Overview & First Impressions
Copper handles are either the entire reason you buy a knife or the reason you put it back on the shelf, and the Butterfly-CU knows which side it is on. The 2.99 inch clip point is 14C28N with a stonewash, the handle is copper, and the whole thing weighs 4.68 ounces. That is heavy for a 6.81 inch folder and it is supposed to be. Copper is a material you feel in the hand, and the weight is part of what you are paying for.
Materials & Construction
14C28N is the Sandvik stainless that became the default for anyone who wants a knife that stays rust free and sharpens on anything to hand. At 60 HRC plus or minus two it takes a fine edge fast and holds it through normal use, though dirty cardboard will send you back to the stone sooner than M390 would. The blade is 0.12 inches thick and 0.96 inches wide, which gives it a thin, slicey geometry. The stonewash hides scratches better than any other finish.
Design & Details
The copper scales are both the story and the maintenance schedule. Raw copper oxidises, which means this knife will look different in three months than it does today, and that is either patina or damage depending on your taste. The crossbar lock sits under the thumb and releases with a spring, and ceramic bearings keep the action smooth despite the extra handle weight. It is the same lock architecture as the rest of the Trivisa line, which is a good thing.
Real-World Use
The weight is noticeable in light shorts and invisible in jeans. In hand it gives the knife a planted, deliberate feel that titanium cannot match; you know where the handle is without looking down. Cutting performance is all 14C28N and geometry, and the thin stock moves through an apple or a pepper without splitting it. These are folding knives that end up in the kitchen drawer more often than the toolbox, and this one is no exception.
Ownership Notes
If you want the copper bright, polish it with a paste and keep it dry. If you want it to age, do nothing and let it go brown, then card the surface with fine steel wool when it gets patchy. Either way, do not use a harsh metal polish on the blade, because it will flatten the stonewash. A wipe down and a drop of oil on the pivot is the whole routine. If your EDC knives have all been titanium and liner locks so far, a copper scaled crossbar folder is a cheap way to find out whether you enjoy a knife that visibly ages.
Who Is This For?
Buy it if you like the look of copper and want a knife that changes with use, or if you want a 14C28N blade that stays easy to sharpen without special stones. Skip it if you want a light knife, if you hate fingerprints, or if you need a handle that looks identical in five years. Copper is a commitment, not a finish.
Final Verdict
The Butterfly-CU is not a knife for everyone, and that is fine. It has a real steel choice, a modern lock and a handle material that will make it yours over time. If you have been curious about copper carry pieces, this is a cheap and genuinely functional way to try one. EdcMall has it alongside the rest of the Trivisa range.
