I recently received the new U1 Pro utility knife from OKnife and it does appear, at least at first glance, to be an upgrade from the usual utility blade holder folder. I’ve had a few of these kinds of knives over the years and I can appreciate the convenience of swapping out a dull blade for a sharp one, but my overall preference is for a more traditional type blade. Even so, I do recognize that this is a very attractive option for those who don’t know how or don’t like to sharpen things.The blade slots into the blade holder securely using a small thumb wheel and is so tight from the factory that I had to use pliers to release it. It’s a simple system that is perhaps a bit too simple- I have concerns about the longevity of the tiny thumb screw and I would prefer a two screw system, and perhaps actual screws versus thumb screws.
The actual blade itself is, as one would expect, a standard utility blade style, which should be available at virtually any hardware store. They can be had cheaply and in volume, so having a few spares around shouldn’t be a challenge, which is good because we all know a dull blade is a dangerous blade. 
This particular iteration of the standard utility holder folder is that unlike many that have an aluminum handle, this one is more of a standard tactical folder type frame, complete with Micarta scales, pocket clip and a sliding bolt lock that is very similar to the Benchmade Axis Lock system.
It also features a one handed opening blade holder with some jimping along the spine to allow for a little more control when cutting, a feature that is very important when dealing with utility blades due to their extremely thin edge geometry.
It’s other neat claim to fame is the fold out mini bit driver which comes with a double ended bit which features a Phillips 0 and a 3.5mm flat head. This bit driver folds out and uses a button lock to snap into place. The bit is held in with a magnet and feels secure enough to do the job, but without adding difficulty to removing it.
One thing to note- the bit driver uses 4mm bits rather than the more standard ¼”/6mm bits. As a Canadian, I deal with Robertson its frequently enough that I would like the option to change to different bits, and the ¼”/6mm bit size is a lot more common.
Along with the knife though is a small one piece tool, very similar to a Leatherman Brewzer but smaller and lighter. Honestly, it seems too small to be of any real use for much, so I really wouldn’t buy the knife for it. But since it’s part of the package, it adds the versatility of a very light duty pry bar, bottle opener and some wrench cutouts.
Personally, I find the handle a little bulky and square, and I would like to see some more ergonomic contouring and also some kind of milled texture. As it is, the flat micarta slabs are a bit slick feeling, and I can only imagine that in wet weather that will be even worse. Again, given the extremely narrow edge geometry of a utility blade, you really want to be sure it only cuts when and where it is supposed to and nowhere else.Overall I like this knife. I feel there is a definite place in the market for it, and with a few tweaks I think it could be a serious contender, at least for now. I like the addition of the bit driver to a typical folding box cutter design, and I think this is very good start to what could be an excellent line of tools.
For now I would say that the ergonomics, materials, the fragility of utility blades and the smaller 4mm bit driver that this is a knife that should be reserved for light or (perhaps carefully) medium duty work.
