This compact guy measures just 3.38 inches closed and 5.74 inches overall. The U1 Ultra is available in OAL (Olight’s proprietary aluminum blend) or titanium. I went with the titanium version—because why not, it’s titanium. That alone was enough to sell me. It has a nice heft for the size, and while the handles aren’t milled out for weight reduction, I’m glad they left it solid. The weight makes it feel substantial without being bulky.

The handle has a clean, milled design and a smooth bead-blasted finish. It’s simple, good-looking, and grippy enough to inspire confidence. In hand, it’s a three-finger knife. Your index and middle fingers settle nicely into the recessed portion of the handle, and there’s some jimping near where your ring finger lands, which really helps lock in your grip. There’s also subtle jimping on the spine of the blade holder. It’s not aggressive, but it’s just enough texture where it counts. My only real gripe is that I wish it had a forward finger choil. I keep wanting to choke up, but there’s just nowhere to go. It’s not a dealbreaker, though—this thing is still very comfortable for what it is. I wouldn’t reach for it to break down a dozen boxes in a row, but for day-to-day stuff? It’s solid. Working in the grocery industry, I go through a lot of boxes, and the U1 Ultra has handled everything I’ve thrown at it.

OKnife talks up the blade exposure on this one, and it’s a standout feature. Most utility knives only expose a quarter to half of the blade. The U1 Ultra goes further, giving you access to about 85% of the cutting edge. It’s a unique design choice, and I’m still deciding how I feel about it. I’m so used to just using the tip or edge near the tip that having the full blade available feels like overkill at times. But I can also see how that extra real estate could be beneficial for certain tasks. I do wish they had sacrificed a bit of that exposure to carve in a forward choil, but I’ll probably come to appreciate the extra blade as time goes on.

Blade changes are easy—just loosen the thumb screw on top of the blade holder, swap it out, and tighten it down. It takes a little finesse to find the sweet spot, but once it's secure, there’s no play in the blade at all. Zero wiggle, vertical or horizontal.

And this isn’t your typical stainless blade, either. The U1 Ultra ships with a zirconium oxide ceramic blade. That caught me off guard in the best way. Ceramic is a bold choice, but paired with the titanium, it really drives home the premium feel. And performance-wise? It’s excellent. Ceramic blades are wicked sharp and hold their edge for a long time. You’ve got to avoid staples and keep from applying lateral pressure—snap one of these and you’ll feel it—but for straightforward slicing, it’s fantastic. I usually run Lennox Gold or DeWalt Carbide blades, which are plenty tough and have decent longevity, but this ceramic edge has outperformed both when it comes to edge retention. I’m still not sure if I’ll replace it with another ceramic when the time comes, but I’ve been impressed so far.

Deployment is smooth and satisfying, thanks to the ceramic bearings. You can open it via rear flipper or thumb studs, and I find myself using both just to mix it up. I’ve been carrying the TiRANT RazorV3 for a while, which also has a flipper tab, so that feels most natural, but I appreciate having the option. Instead of the usual cross-bar lock seen on other OKnife models, the U1 Ultra uses a button lock, and I think it’s the right call for a knife this compact. It’s easy to operate, fidget-friendly, and still provides a secure, rock-solid lockup even after hundreds of openings.

The pocket clip is a deep-carry steel spring clip with the company logo billboarded on it. Retention is excellent. It grabs onto fabric and doesn’t loosen up over time. The tension feels just right—not too tight to be annoying, but not so loose that it shifts around. The deep-carry position also helps this thing disappear in the pocket, which is exactly what I want from a utility blade.

Final Thoughts

The OKnife U1 Ultra impressed me. Coming from over a year of carrying the TiRANT RazorV3, I wasn’t sure what to expect, but this knife delivered. It’s compact, comfortable, fidgety, and the ceramic blade brings a performance edge you won’t find on your average box cutter. I’m still adjusting to the full blade exposure, but I can see how it might become an asset. If you’re looking for an affordable, high-quality utility knife that doesn’t feel like a compromise, the U1 Ultra is worth a serious look.

To check out this and the other models you can follow the link below:
https://u1u.ofan.club/multitool.org