I have several Chinese SAK-type knives. They have more in common than they are different.
They all have at least some brutally stiff springs.
Fit and finish is poor. There's huge gaps between liners and backsprings, and toolmarks on the backspring side covered by the tools.
The awl will probably be completely worthless. They are flat, completely unsharpened, and very, very dull.
The corkscrew is is very skinny and is probably worthless. It's much narrower in diameter and uses much thinner stock than its Swiss counterpart. It just barely probably won't poke you, and creates a brutal hotspot if you use any of the other tools for anything more vigorous than opening mail.
The fingernail file is probably worthless. They tend to have parallel grooves stamped in them as the abrasive surface, which is worthless. The stock is too thick, and isn't narrowed at all so it will probably be too fat to clean out under your fingernail.
The saw is probably serviceable.
The scissors are loose and have tool marks. They may fall apart. The spring may be crooked.
All of the tools on the backspring side have the same height when closed and are brutal to open. You will have to use something else to pry up tools until you can get to the one you want.
The bottle opener may or may not actually open bottles, and only if you can get it open without finding something else to pry it open with. A bottle opener opener, if you will

. The tip is rounded, short, and fat, which is not good for a screwdriver.
The can opener is dull, nearly flat, and has a part that is stamped so that it almost looks like it's sharpened (it isn't). Interestingly enough, this is on the opposite side of the can opener as on a real Wenger. On one of the knives, it was so difficult to open I almost gave up. I haven't tried to open a can with one, but I don't see it going well. If I remember, I'll try them later tonight when I make dinner and report if they actually work.
The Philip's head screwdriver is probably serviceable. I tried one just now, and it fit and turned a screw (shocking, considering the rest of the tool), but I would expect bad things if you torqued down on it.
The blade is mystery Chinese steel. I don't like these knives very much, so I don't use them much. I haven't tried to sharpen them, but I wouldn't expect much. The truth is, most people's EDC tasks are quite mild, and I'm sure the blade will open mail beautifully. The profile is very strange, as they have very little or no belly. Almost closer to a modified wharncliffe than a real SAK-style spearpoint.
The toothpick may fit loosely and be easily lost. Knowing the quality of the rest of the tool, it wouldn't surprise me if it was poisonous or radioactive.
The tweezers are very cheesy and are also loose enough to possibly lose, which would be no great loss.
No idea on the fish scaler.
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So, in conclusion, for $4, you get a mystery China blade, a saw and screwdriver of dubious quality, and a whole bunch of heavy bulky junk tools.
A waste? I think so, but it's only $4 so at least it's not too bad.
You could probably find a nice used or seized real SAK that was actually made in Switzerland fairly cheaply on ebay or elsewhere. Even new, they aren't that expensive. Or, FelineVet of SOSAK has some preowned full size real SAK's for as little as $6 (plus shipping). Also, it's important to note that a real SAK has a limited lifetime warranty.
Also, make sure you tell us about it when it gets there. I'm very curious how it compares to mine.