Size: 0Nominal Diameter Small End: .1287"Nominal Diameter Large End: .1638"Nominal Overall Length: 2-15/16"Nominal Flute Length: 1-11/16"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