There a two kinds of Chinese tools, very good and very bad .... I'd hang on to them until you find out which you really have. A quick way to find out is to just touch a grinding wheel with one, good steel will give a good shower of sparks. Chances are they are the very bad variety, but one never knows... in the mean time I'd suggest sending an email to
rick@littleshavers.com
or give him a call at (206)767-7421 and have him fix you up with the tools you need. He's very helpful and will not sell you something you don't need, even if he has to send you elsewhere.