Construction Reamer, Straight Shank With Safety Collar Shank, Large End Dia. (In.) 1/2, Shank Dia. (In.) 1/2, Flute Length (In.) 3-13/16, Overall Length (In.) 5-15/16, Left Sprial Right Cutting, High Speed Steel, Bright Finish, Reaming, True, Enlarge, Align and Debur Holes In Structural Steel Members Such As I-Beams, Angles, Channels And Plates