Construction Reamer, Straight Shank With Three Flats Shank, Large End Dia. (In.) 9/16, Shank Dia. (In.) 1/2, Flute Length (In.) 3-3/4, Overall Length (In.) 5-7/8, Left Sprial Right Cutting, High Speed Steel, Black Oxide Finish, Reaming, True, Enlarge, Align and Debur Holes In Structural Steel Members Such As I-Beams, Angles, Channels And Plates