Size: 2Nominal Diameter Small End: .1605"Nominal Diameter Large End: .2008"Nominal Overall Length: 3-3/16"Nominal Flute Length: 1-15/16"Has A Square Shank For Use By Hand In Tap And Reamer WrenchesDesigned To Ream And Deburr Holes By Hand Into Which Standard Taper Pins Will Fit