Drill America 11/64 in. x 3/16 in. Shank High Speed Steel Long Double End Mill Specialty Bit with 2-Flute DWCT105A - The Home Depot
Twist Drill Nomenclature/ Parts of a Twist Drill | Mecholic
5/16" HSS, Double Flute Brad Point Drill Bit - Fractional FSF-321224 from FISCH - Acme Tools
Amana Tool High Speed Steel (HSS) Double Flute Spiral Aluminum Cutting 5/16 Dia x 3/4 x 1/2 Inch Shank Down-Cut Router Bit - Edge of Arlington Saw & Tool, Inc.