Construction Reamer, Flute Type Spiral, Spiral Direction Left Hand, Cutting Direction Right Hand, High Speed Steel, Dimension Type Fractional Inch, Decimal Equivalent 0.6250 In., Size 5/8 In., Number of Flutes 5, Flute Length 4-1/4 In., Overall Length 6-3/8 In., Black Oxide Finish, Chamfer 60 Degrees , Large End Dia. 5/8 In., Shank Type Straight with Three Flats, Shank Size 1/2 In.