I bought some bits for my drimmel a couple of weeks ago from CHINA, I know what your thinking. Well the ones I buy from drimmel are JUNK and do a bad job I was really surprised when I first tried the china ones they were so smooth and cut so fast with no JUMPING and they are carbide also, don't care if you guys want to try them or not but I am sold and I'm 80 years old and know a good tool from a bad one.