I don't know what's up with smaller bits, can't find a decent set that doesn't break. I was slowly drilling through the 1085 steel I make my knife from and the 1/8" bit just broke off. I went to the store, bought an untitled Chinese set and finished the job. Update: My 1/8" chipped a bit in the black brass I was slowly drilling. It broke in the block and I couldn't get it out. Ruined a piece of $20 brass. The only trouble with these bits is in trying Get them out of what breaks them Buy something else.