39/64" HSS Black Oxide Jobber Length Drill Bit, Drill America | D/AN39/64 | DrillsandCutters.com
UNBRANDED DRILL BIT 39/64 0391BTF OAL 5-7/8" LOC 3-1/4" SHANK 2-5/8" | eBay
HSS 2 Flute Drill .6094 (39/64) Cutting Dia X 4.53 Flute Length MariTool
Dormer 39/64 in A100 Jobber Drill 5966663, Right Hand Cut, Steam Tempered Finish, 178 mm Overall Length, 4 x D Standard Spiral Flute, High-Speed Steel | RSHughes.com
Drill America 39/64-in 6-in Cobalt Silver and Deming Twist Drill Bit in the Twist Drill Bits department at Lowes.com