Milwaukee #10 Countersink 3/16 in. Wood Drill Bit 48-13-5002 - The Home Depot
Countersink Drill Bit Set, 5 Pieces High Speed Steel 82 Degree 5 Flute 6mm Round Shank Mill Cutter Bit Countersink in Sizes 1/4” 3/8” 1/2” 5/8” 3/4” Set with Carrying Case. - Amazon.com
DEWALT #6 9/64 in. High Speed Steel Countersink Drill Bit DW2567 - The Home Depot
5-pc #12 Countersink Counterbore Drill Bit Set 3in1 for Woodworking #12 Screws, 9/64" M2 Pilot Drill Bits Adjustable Depth, 82-Degree Chamfer with Stop, 1/4” Hex Shank, Includes 2 Allen Wrenches - Amazon.com