Do It Best Cobalt Drill Bit 15/64" 367125 (Pack of 13) | eBay
15/64" Dia. x 6 mm Shank x 28 mm Flute Length x 66 mm OAL, 3xD, TiAlCN, 2 Flute, Coolant Thru, h6, Cylindrical, Solid Carbide Drill Series/List #NG12 MT021126237 - First Industrial Supplies
1.58mm to 12.7mm by 64 THS Stainless Steel Drill Bit Gauge Permanently Etched Imperial Graduations From 1 Sixteenth Inch to Half an Inch - Etsy