A problem when buying cheap Asian end mills is that some are quite sharp and some are not when brand new. Also,the HSS bits seem to be a good deal more brittle than USA HSS. The coatings can be extremely thin also. You buy them at your own risk. As with everything Asian,quality control is iffy. Most of the time for home shop use,they'll be o.k.,though a brand new cutter that isn't quite sharp is not the best tool to have.