WESTWARD 12G357 Construction Reamer Hex Nut Shank With Safety Magnet Large End Dia. 7/8 In In. Shank Dia. 1 7/16 In In. Flute Length 5 In In. Overall Length 7 In In. left Sprial Right Cutting Material HSS M2 Finish Black Oxide Application Use Them To Ream True Enlarge Align And Debur Holes In Structural Steel Members Such As I-Beams Angles Channels And Plates