That being said, it's kind of hard to tell you what freewheel removal tool you need without seeing a good image of your freewheel, as my x-ray vision tends to fail across oceans. Remove the wheel, remove the QR skewer (or nut), and take (and post) a good close-up pic of the splines of your freewheel body. Also, how many cogs does it have? Are you sure it's a freewheel and not a cassette (just asking, as some do not know the difference).
If I had to hazard a guess, I'd say it probably uses the same splines as Shimano, i.e., the FR-1. Many off-brands do. Or, at least, it will be close enough to work at least once. Don't forget you'll likely need access to a securely mounted vice, or at least a wrench with a very long handle to break it free.
You could also use the "destructive method of removal" as detailed by Park at http://www.parktool.com/blog/repair-help/freewheel-destructive-removal