Trivisa Dragonfly Ultra-M JM03-M-M M390 Blade Titanium Handle Crossbar Lock Folding Knife

The Trivisa Dragonfly Ultra-M JM03-M-M combines a compact profile with premium materials for everyday carry and outdoor use. Its 2.99-inch drop-point blade is crafted from M390 stainless steel and finished with a mirror polish. Known for wear resistance, corrosion resistance, and edge retention, M390 can be challenging to sharpen and may chip under heavy lateral stress. A titanium handle offers a lightweight feel, while the crossbar lock provides secure blade retention. Ceramic ball bearings support smooth opening. Measuring 6.73 inches overall and weighing 3.04 ounces, this folding knife balances portability with practical cutting dimensions. Designed by the TRIVISA team, it is suited to everyday carry, hiking, camping, fishing, and hunting tasks. Blade hardness is rated at 60 ± 2 HRC.

M390 Blade Introduction

M390 is an advanced powder-metallurgical stainless steel utilizing high chromium and vanadium content to deliver exceptional wear resistance and industry-leading corrosion resilience. It excels at retaining a razor-sharp edge under prolonged use; however, this extreme hardness renders the blade notably difficult to sharpen or reprofile without diamond abrasives. Additionally, its fine microstructure, while offering superior edge stability, sacrifices some structural toughness and may be more prone to chipping under heavy lateral stress.

Specification

Designer: TRIVISA Team
Style: Drop Point
Blade Material：M390 Steel
Blade Finished：Mirror
Handle Material: Titanium
Lock Style: Crossbar Lock
Hardness: 60 ± 2 HRC
Bearing: Ceramic Ball Bearing

Size:
Overall Length: 6.73" (171 mm)
Blade Length: 2.99" (76 mm)
Handle Length: 3.74" (95 mm)
Blade Thickness: 0.12" (3.1 mm)
Blade Width: 0.8" (20.3 mm)
Net Weight: 3.04 oz (86.3 g)

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

Trivisa Dragonfly Ultra-M JM03-M-M: Mirror M390 on Textured Titanium

The Trivisa Dragonfly Ultra-M JM03-M-M is a 2.99 inch M390 drop point on a textured titanium handle, and at 86.3 grams it is the version of the Dragonfly you carry when the knife has to disappear into a pocket but still cut like a full-size folder. The blade is Bohler M390 at 60 +/- 2 HRC in a full mirror polish - the finish that shows every scratch and therefore the one that tells you the blade was actually finished rather than tumbled. M390 is the reference steel for edge retention in production knives: roughly 1.9 percent carbon and 20 percent chromium give it weeks of cardboard performance and near-saltwater corrosion resistance. The M390 collection is where this steel lives in the catalogue, and the Dragonfly is one of the lightest knives in it. The handle is machined titanium with a fine diamond knurl pattern cut across both scales - enough texture to grip through wet hands, not so much that it chews a pocket seam. The pivot collar is anodized orange, which is the only colour on the knife and the reason it reads as a custom piece rather than a production folder. The lock is a crossbar lock: ambidextrous, and unlike a liner lock it cannot be forced open or closed by spine pressure, which matters on a knife this small because you will use it at odd angles. A ceramic ball bearing under the pivot and a pair of thumb studs complete the action. At 6.73 inches open with a 3.74 inch handle, the Dragonfly Ultra-M carries like a compact and cuts like a mid-size. If you want the same construction in a larger frame, the rest of the Trivisa Knives collection runs from this up to full 3.5 inch folders.

What M390 at 60 HRC Buys You - and What It Costs

M390 is a third-generation powder-metallurgy stainless from Bohler: about 1.9 percent carbon, 20 percent chromium, plus molybdenum, vanadium and tungsten. That recipe produces a very high volume of hard vanadium and chromium carbides, which is exactly what makes it hold an edge. In a cardboard test it will out-cut CPM-S35VN and 154CM by a wide margin, and it will still be cutting when 14C28N has needed two touch-ups. It is also close to rust-proof in normal carry. The cost is on the sharpening bench, not in the pocket. At 60 HRC with that carbide load, M390 laughs at a soft Arkansas stone and only grudgingly submits to a water stone. A diamond plate at 15-18 degrees per side is the correct tool, and a loaded strop is what turns the result into a shaving edge. The second cost is toughness: a fine, hard apex can chip if you twist the blade in a cut or hit a staple. Treat it as a cutter and it will outlast the handle. The table below puts it against MagnaCut, CPM-S35VN, 154CM and 14C28N on the five numbers that actually matter.

Why the Dragonfly Ultra-M Belongs in Your Pocket

• 2.99 inch (76 mm) Bohler M390 drop point at 60 +/- 2 HRC with a full mirror polish - edge retention in the top tier of any folding knife at this size.
• Machined titanium handle with a diamond knurl pattern on both scales: real mechanical grip, not a sticker or a moulded texture.
• 86.3 grams (3.04 oz) at 6.73 inches open - light enough for a shirt pocket, substantial enough to fill a hand.
• Crossbar lock: fully ambidextrous, and it cannot be forced by spine pressure the way a liner lock can.
• Ceramic ball bearing pivot on stainless races for a fast, rust-proof action that survives grit.
• 3.1 mm blade stock with a thin edge geometry behind the bevel - this is a slicer, not a wedge.
• Anodized orange pivot collar as the single accent: a deliberate design decision, not a colour-blocked handle.
• Thumb studs sized for gloved hands, with a detent that is positive without being stiff.

Best Uses for the Dragonfly Ultra-M

• Office and urban EDC. The mirror blade and textured titanium read as jewellery in a meeting and still break down a box in the corridor.
• Hiking and camping light. 86 grams is nothing in a hip belt pocket, and M390 will handle cordage, food packets and kindling without needing a touch-up mid-trip.
• Fishing. M390's corrosion resistance is the reason this knife belongs on a boat - rinse it, dry it, and it does not spot.
• Hunting and field dressing. A 3 inch drop point with a thin edge is the right geometry for opening an animal without nicking the gut.
• Collecting compact premium folders. If your rotation is full of 3.5 inch frame locks, this is the one that actually leaves the drawer.

Frequently Asked Questions

Is a mirror polish practical on a user knife?
It shows scratches, so no - it is not the finish for a work knife. It is the finish for a knife you want to look at, and it has one functional advantage: a polished bevel has less friction, so it slides through wet or sticky material with less drag than a stonewash. Keep it wiped and it stays bright.

How is a crossbar lock different from a liner lock?
A liner lock is a spring bar pressing on the blade tang from one side, so it is handed and it can be defeated by spine whack. A crossbar lock traps the tang with a bar that travels across the blade from both sides - ambidextrous, and far more resistant to accidental release. It also keeps your fingers out of the blade path when you close it.

Can I open it with gloves on?
Yes. The thumb studs are proud enough to catch a glove seam and the detent is tuned light enough to roll open with a thumb rather than a flick.

Will M390 rust if I carry it in a sweaty pocket?
In practice, no. At roughly 20 percent chromium it is in the same corrosion class as M390's cousins 20CV and CTS-204P, which are about as stainless as knife steel gets. Wipe it dry and it will not spot, even in coastal air.

Is 2.99 inches enough blade for real work?
For 90 percent of daily cutting, yes. The limitation is not the length but the task: you will not baton wood or break down a full pallet with it. Within cartons, rope, packaging, food and fieldwork it is enough.

Bohler M390 vs. Common Premium Folding Knife Steels

Steel	Typical HRC	Edge Retention	Corrosion Resistance	Toughness	Sharpening Ease
Bohler M390 (this knife)	60-62	Excellent	Excellent	Fair	Hard
CPM-20CV	61-62	Excellent	Excellent	Fair	Hard
CPM-MagnaCut	62-64	Excellent	Excellent	Excellent	Moderate
CPM-S35VN	58-60	Very Good	Very Good	Good	Moderate
154CM	58-61	Good	Good	Very Good	Moderate
14C28N	58-61	Good	Excellent	Good	Very Easy
D2 Tool Steel	58-61	Very Good	Fair	Good	Moderate

Bohler M390 is the Austrian third-generation powder stainless that set the benchmark for production knife steel: about 1.9 percent carbon with roughly 20 percent chromium plus molybdenum, vanadium and tungsten. At 60 +/- 2 HRC it keeps a slicing edge through weeks of cardboard and still shrugs off sweat and salt water. The trade-off is a dense carbide structure that wants diamond to sharpen and a fine apex that dislikes prying. 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.

Dragonfly Ultra-M
Trivisa's compact crossbar-lock folder: a 2.99 inch mirror polished M390 drop point on a textured titanium handle, ceramic bearing, 86.3 g.

Bohler M390
An Austrian third-generation powder-metallurgy stainless with about 1.9 percent carbon and 20 percent chromium. It is the reference steel for edge retention in production knives and is highly corrosion resistant.

Crossbar Lock
A spring-loaded bar that slides across the blade tang to lock it open. Ambidextrous, keeps fingers out of the blade path when closing, and cannot disengage under spine pressure the way a liner lock can.

Titanium Handle
A light, strong, corrosion-proof metal with a warm feel and no magnetic signature. It accepts anodizing in colour, which is why pivot collars and hardware can be tinted without paint.

Mirror Polish
A fully refined surface taken to a near-reflective finish. It shows every scratch but slides through wet material with the least drag.

Ceramic Ball Bearing Pivot
A pair of ceramic balls running in steel races between the blade and the handle. Lower friction than washers, immune to rust, and unaffected by the grit that eventually fouls a phosphor-bronze washer.

Thumb Stud
A pair of posts threaded into the blade that catch the thumb for one-handed opening. Faster than a hole on a stiff detent, but they sit in the way when you sharpen near the plunge line.

HRC (Rockwell C)
The hardness scale used for knife steel. Higher HRC means better edge retention and more brittleness; 58-61 is a working range, 62-64 buys edge holding at the cost of shock tolerance.

Who Should Buy the Dragonfly Ultra-M

• You want M390 edge retention in a knife that actually disappears in a pocket.
• You are left-handed and want a genuinely ambidextrous lock, not a compromised liner lock.
• You want machined titanium texture rather than a moulded G10 scale.
• You carry near water, sweat or salt air and need a blade that will not spot.
• You are adding a compact premium folder to a crossbar lock rotation.

Who Should Skip It

• You only own a pull-through sharpener. M390 at 60 HRC needs diamond and will be ruined by carbide V-slots.
• You pry, scrape or twist with the tip. The fine mirror-ground apex is the least forgiving part of this knife.
• You want a heavy, hand-filling work knife. At 86 grams this is deliberately light.
• You need a blade over 3.5 inches for camp chores - look at the larger Trivisa frames instead.
• You want a beater you can lend out without caring. The mirror finish will show every mark and you will mind.

Care & Maintenance

• Wipe the blade dry after every use; M390 is highly corrosion resistant, but fingerprints left on a mirror polish etch the surface over time.
• One drop of light knife oil at the pivot monthly, then pull the crossbar and swing the blade a dozen times so oil reaches the ceramic bearing.
• Keep the crossbar track clean: blow out lint and grit with compressed air before oiling, or the bar will start to feel notchy and hang halfway.
• Do not over-tighten the pivot. M390 at 60 HRC needs a free-swinging action; a crushed bearing race is not covered by any warranty.
• Sharpen M390 on a diamond plate at 15-18 degrees per side. Water stones cut it, but slowly - the carbide volume is high and the steel resists abrasion by design.
• Finish on a loaded leather strop with light passes. Heavy pressure on a strop rounds the apex you just set, and M390 is slow to reset.
• Wipe the textured titanium scales with a dry cloth; the machined diamond pattern holds less grime than flat scales, but sweat collects in the grooves.
• Do not polish the orange anodized pivot collar with abrasives - anodizing is an oxide layer, not paint, and polishing burnishes the colour off.
• Check the clip and body screws every month or two with the correct Torx driver, and never pry or twist the 3.1 mm blade.