Review on Professional Drilling Cobalt 1 0 5 0MM Stainless by Josel Lambert

Strange list. Various bit widths are specified up to 5mm, but all widths are 1mm or less. The listing lists sizes from 1mm to 5mm and then says "optional" whatever that means. Either way you get 10 SUPER small pieces that a jeweler could probably use, but they seem so fragile I don't think they can be used for anything.