I have a couple of these items. The folding knife I think could potentially be made into a desirable item. You're right. It doesn't lock. I guess you'd say it's more of a slipjoint, with a mechanism similar to the Utilikey. It also functions as the keychain holding point. When you open the blade, it is removed from your keychain or whatever it's attached to. It is, unfortunately, a pretty sloppy implementation of an idea. The wrench cutout seems to be unusable. The bottle opener on mine could be better. And worst of all, the blade edge rests on a curved steel surface when closed. Even if the chisel ground blade is perfectly sharpened, it is damaged whenever closed.
I also bought the tactical hair clip, because I have to be able to laugh at myself and my fellow multitool/tactical knife nuts. I have no idea what I'd use it for. It seems like it would be a satisfactory hair clip.
The pocket knives are interesting. I've started collecting Chinese pocket knives that appear to be made for domestic markets. All have been inexpensive, with brand names like Hong Jie, Rimei, Bazo, and quite a few that either have no written english name, or even no name at all. I find them via various sources, from ebay to China or Hong Kong based internet vendors, to my local Chinatown. Some have remarkably rough quality. Many exhibit surprisingly nice fit and finish. A very common construction style seems to typically involve slipjoint design, with stainless handles, screw fastener construction, with a finish of black paint and ground flat surfaces. It can be a very pleasant look, though the shapes and aesthetics otherwise might not be so appealing. Many of these knives, even the cheapest, roughest ones are actually reasonably good users. In fact, of this lot, I carry one regularly, a very roughly finished slipjoint, blanked with some of the sloppiest dies I've seen, into a shape that has some perplexing ornamentation, and manages still to be a pretty good cutter, with nice blade snap, very thin in the pocket, and is even capable of one hand opening. I've never seen the brands you posted, but the construction style looks pretty typical.