My list of bits measured with a digital caliper. Advertised = Relevant. Quantity x size in inches. 0385x0.024 = NO5x0.02 = 9x0.018-0.019 So they all differed in the range of 1 to 6 mils. And I didn't get any of the .024 bits, which of course is one of the bits I need to open a carburetor jet. Should not be returned. upset.