Overview & First Impressions
Under five grams. That is lighter than the key it hangs next to, and it is the entire argument for the NTK05. This is a folding scalpel body machined from TC4 aerospace grade titanium, sized to disappear on a keyring, that takes standard scalpel blades. It is not a knife in the sense that a folding knife is a knife. It is a precision cutting tool that happens to fold, and once you stop expecting it to whittle you will find it does a surprising number of things well.
Materials & Construction
The body is TC4 titanium, CNC machined, with a keyring hole integrated into the grip rather than bolted on. Titanium here is not for show: it means the frame will not rust against your keys, will not bend when you sit on it, and will not weigh anything. The blade is a replaceable scalpel blade, which is the clever part, because a dull scalpel blade is a two dollar problem rather than a sharpening session. There is no lock, only friction and a shaped grip that keeps the blade oriented while you cut.
Design & Details
The proportions are the design. The handle is barely longer than the blade, so the whole thing is about the size of a house key, and the blade sits at a slight angle to the grip which makes it comfortable to pull toward yourself. Deployment is a thumb roll rather than a flick, and closing it requires you to fold the blade back into the channel deliberately. That deliberation is a feature: there is no spring, so nothing can fail open in a pocket.
Real-World Use
This is a utility knife for people who open packages with a key and regret it. Tape, shrink wrap, blister packs, paper, labels, a loose thread, the plastic collar on a new cable. It is excellent at all of those and dangerous at anything involving force, because the blade has no guard and the handle is tiny. It is also the least threatening knife you can carry, which matters in offices, hospitals, schools and anywhere a folding knife gets a second look.
Ownership Notes
Scalpel blades are sharp in a way that surprises people who are used to knives, so change them with pliers and dispose of the old one in something rigid. Keep the hinge dry, because titanium does not rust but the blade will, and a rusty blade in a titanium frame is a waste of both. Wipe the blade with alcohol after opening anything messy. There is no sharpening routine, which is the point, and a spare blade costs less than a coffee. There is a whole category of folding knives built around replaceable blades, and it exists because a fresh scalpel edge beats a dull knife every single time. This is the smallest useful member of that family.
Who Is This For?
Buy it if you open more packages than you cut rope, and if you want a cutting tool that nobody will ever question. It suits office workers, photographers, crafters, hikers counting grams, and anyone who travels and does not want to explain a blade. Skip it if you need to cut anything structural, if you lose small objects regularly, or if a loose scalpel blade in a pocket sounds like a bad idea. It does not lock, and it is not meant to.
Final Verdict
The NTK05 is the smallest thing in this batch and the one most likely to be carried every single day. EdcMall lists it next to the titanium utility tools and the wider range of EDC knives, and it makes a sensible add-on purchase rather than a main one. Hang it on a keyring, add a small lanyard bead so you can find it, and it will outlive the keys.
