This Micro EDC Tool Borrowed Its Geometry From the Karambit

Micro EDC tools tend to follow the same formula: take a regular knife, shrink it down, and hope it still works. The NanoArc from Zyac Knives takes a different approach entirely. Instead of miniaturizing a straight blade, the team built a curved cutting tool from GR5 titanium and M390 steel that the company says actually performs better as it gets smaller. The campaign on Kickstarter has already raised over $39,600 from nearly 700 backers, blasting past its $3,000 goal by more than 1,300%, and it still has 19 days left.

Price: From $29
Where to Buy: Kickstarter

At 37.93 mm closed and 5.82 grams in its titanium configuration, NanoArc sits closer to what the team calls a “jewelry-level form factor” than a traditional pocket knife. The team designed it to clip onto a keychain, ride on a necklace, or even sit on your finger as a ring. Here are seven things that make this tiny curved blade worth a closer look.

1. The Curved Blade Is Engineered to Cut Better at Micro Scale

According to Zyac Knives, most micro blades lose cutting efficiency because straight edges disengage too quickly at small sizes. The team says the NanoArc’s inward curve solves that problem by maintaining constant edge contact through each cut, turning minimal motion into controlled, precise cutting. The curved form is adapted into a compact design that the team describes as purpose-built for precision. If the shape looks familiar, that’s intentional — the campaign says it’s “inspired by karambit-style blade geometry,” adapted into a micro format.

According to the campaign, the 14.8 mm blade isn’t meant for heavy-duty work. Instead, it handles the everyday tasks that come up constantly: opening packages without tearing them, snipping zip ties and cords, cutting threads and tags, and trimming tape cleanly. The curved geometry means those tasks require less force and fewer passes than a comparably sized straight blade, according to the team.

2. It’s Built From GR5 Titanium and M390 Steel

The standard NanoArc pairs a GR5 titanium handle with an M390 steel blade, finished in beadblast gray. M390 is widely recognized in the knife community for its edge retention and corrosion resistance, and GR5 titanium keeps the overall weight at 5.82 grams. According to the campaign, the design prioritizes balanced proportions that make the tool feel intentional rather than just small.

The overall length sits at 37.93 mm when closed and 50.64 mm when open. For context, the closed length is shorter than most car key fobs. Zyac Knives notes that all components are CNC-machined, with fine jimping along the spine that the team says adds thumb traction for better control during cutting while also bringing a refined texture to the overall design.

3. Three Material Configurations Cover Every Aesthetic

Beyond the standard titanium model, the campaign offers two additional configurations. The Zirconium version swaps in a zirconium handle with a Gold TIN (Titanium Nitride) spine and weighs 7.08 grams. The Zircu-ti version uses a handle made from Zircu-ti, which the team describes as a titanium and zirconium laminate consisting of 6AL-4V and zirconium, paired with a DLC Black Titanium spine at 6.03 grams.

All three configurations use the same M390 blade. The material variety gives backers options that range from understated to collector-grade, and the team says future configurations will be refined with input from the community. Zyac Knives positions the micro scale as a way to make premium materials like titanium, zirconium, and Zircu-ti more accessible without compromising craftsmanship.

4. You Can Wear It as a Ring

NanoArc isn’t only a keychain tool. Described by the team as the third generation of its knife ring series, this version is slimmer and available in ring sizes #8 through #13. The team says it wears like any other ring, and that a quick flip transforms it into a functional cutting tool.

The ring format is the kind of detail that separates NanoArc from the typical small knife category. It turns an EDC tool into something wearable, always accessible, and distinct from most other options in the space. The team notes that the ring version is slimmer and more precise than its predecessors, and says it’s available exclusively through this launch.

5. The Flipper Mechanism Works With One Hand

Despite its compact size, NanoArc uses a flipper open design for one-handed deployment. Ceramic ball bearings in the pivot create smooth action, and the team says the tactile feedback from flipping the blade open and closed is surprisingly satisfying. According to the campaign, a press on the flipper sends the blade open with a crisp, satisfying click.

The fidget factor is intentional, according to Zyac Knives. The team designed the action to feel rewarding even when there’s nothing to cut — the campaign describes it as a “finely tuned tactile experience, engineered to be as satisfying as it is functional.” The team describes the combination of ceramic bearings and a tuned pivot as creating a click that’s addictive to repeat.

6. Non-Locking Design Keeps It Simple and Carry-Friendly

NanoArc uses a non-locking mechanism, which the team says keeps the tool simpler and more broadly acceptable in everyday environments. The trade-off is that there’s no blade lock-up during use, but the campaign describes the non-locking design as compact, intuitive to use, and easier to carry with fewer restrictions across different settings.

The keyring hole measures 6.4 mm in diameter, sized to accommodate keyrings, chains, and carabiners without forcing or scratching during installation. The team says the added clearance helps reduce wear over time and allows smoother movement when attached, a small detail that enhances everyday usability.

7. The Campaign Has Already Raised Over $39,000

The campaign numbers are strong. At the time of writing, NanoArc has raised over $39,600 from nearly 700 backers with 19 days remaining, exceeding its $3,000 goal by more than 1,300%. Zyac Knives brings experience to the table: the Backing Tech team has launched multiple previous Kickstarter projects. The team says NanoArc’s design and engineering are already complete, with the remaining steps focused on production scaling and fulfillment.

Price: From $29
Where to Buy: Kickstarter

Shipping fees will be collected after the campaign ends, calculated based on each backer’s location rather than a flat rate. The team says every unit is planned to undergo visual and functional inspection before shipping.