These drill bits were a waste of money! While they claimed to be industrial grade, they couldn't even handle light drilling tasks. They were flimsy and broke easily, leaving me frustrated and having to purchase a different brand. I expected more from a product in the industrial and scientific category..
Extremely wide shaft, does not fit my drill. The diameter in the description ONLY refers to the size of the drill, not the drill holder. No problem, I'll get back to you. I just bought a 1/2" impact drill so this will definitely NOT fit.