High speed steel alfa USA car reamer, left hand helix, 3 flats on shank 5/8" reamer size (0.6250 decimal equivalent) 1/2" shank diameter, 5/16" point diameter 4-1/4" flute length, 6-9/16" Overall length Made in USA, 1 per pack

Specifically designed for enlarging and aligning existing holes in structural steel erection, automotive, truck / trailer manufacturing and maintenance work. Deburrs welded and punched holes. Built-in collar prevents over-penetration.