Size: 7/0Nominal Diameter Small End: .0497"Nominal Diameter Large End: .0666"Nominal Overall Length: 1-13/16"Nominal Flute Length: 13/16"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