This Lizekm countersink drill bit set is $12, down from $24. It's the best price Amazon has charged for this set.
The set includes five high-speed steel bits with an adjustable depth stop, letting you control both pilot and counterbore depth with the included wrench. Buy Now at Amazon
Features Includes 5 high-speed steel countersink drill bits Bit sizes include 1/8", 9/64", 5/32", 11/64", and 3/16" Comes with 3/8" and 1/2" 82-degree counterbores Depth stop allows adjustable pilot and counterbore depth Includes a 1/4" hex shank and wrench Suitable for wood, plywood, MDF, drywall, and plastic boards