SRM or Sanrenmu is a major knife manufacturer that also makes knives for the cheaper lines of Boker and Spyderco (Byrd), and others.
They also make knives for sale in China (some are the same/similar as the ones they make for other brands), but some are available online, so that they can be purchased worldwide. You basically get a good knife for half, or less, the price it would cost if it had a brand, and guarantee ofcourse, on it.
The consensus seems to be that they are really good knives.
However, their prices have gone up, in the past 3 years.
I have used some for years and they have been really good.
There have been rumours in the past that some for the SRM multitools were not really made by them, though this seems like the genuine article.