Drill America 5/16" x 24" High Speed Steel Extra Long Drill Bit, DWDDL Series

Extra Long, HSS, Straight Shank Drill Bit, Size: 5/16, Dec. Equivalent .3125, Flute Length 18, Overall Length 24 InchesYou may also like 9/16" HSS Spiral Flute Hand Expansion Reamer, DWRRHDES9/16.