DEWALT's Flip Drive Attachment makes countersinking a cinch at $13 (Save 22%)
The Best Drill/Drive Countersink Kit On The Market! - YouTube
Countersink Drive Bit | Makita Drill Drive | Drill Bit Makita | Makita D-73221 - Makita - Aliexpress
Makita 18V LXT Lithium-Ion Brushless Cordless 1/2 in. Driver-Drill Kit, 3.0Ah with bonus Impact XPS 35 Piece Impact Bit Set XFD131-E-01666 - The Home Depot
DEWALT Drill/Drive Set (12-Piece) DW2735P - The Home Depot