IRWIN Unibit 3/8-in 2-Step Drill Bit (7/8-in and 1-1/8-in) in the Step Drill Bits department at Lowes.com
Drill America 27/32 in. High Speed Steel Twist Black Oxide Reduced Shank Drill Bit with 3/4 in. Shank RSD34X27/32 - The Home Depot
IRWIN Unibit 3-Piece Set Step Drill Bit Set (3/16-in to 7/8-in) in the Step Drill Bits department at Lowes.com
Fisch FSF-321224 5/16-Inch High Speed Steel Double Flute Brad Point Drill Bit - Amazon.com
300mm Extra Long High Speed Steel Twist Drill Bit For Soft Metal Wood Plastic Drilling 7/8/9/10/11/12/13/14/15/16mm Diameter - Tool Parts - AliExpress
FTG USA Wood Countersink Drill Bit Set 3 Pc Countersink Drill Bit #6#8#10 Tapered Drill Bits with Improved Countersink Connection Drill Bit to Hex Shank Without Pin and 1 Allen Wrench - Yahoo Shopping
Amazon.com: Klein Tools KTSB14 Step Drill Bit #14 Double-Fluted, 3/16 to 7/8-Inch with Easy-to-Read Step Markings and Targets, 3/8-Inch Hex Shank : Industrial & Scientific
Fisch FSF-176640 Hs Double Flute Brad Pt. Drill - Oal-Cylinder, 8mm Diameter x 110mm - Amazon.com
Bosch MP500T 5PC DAREDEVIL IMPACT TOUGH MULTI-MATERIAL DRILL BIT SET - Toolmarts.com