For professional results, demand Dewalt accessories. This contractor grade countersink and drill bit is ideal for woodworking projects to provide a professional finish. The bit plus countersink provide fast, durable drilling performance allowing woodworkers to create professional looking results in soft and hard woods. For best results and optimized performance, use with Dewalt flip-drive system. Drill, countersink and counterbore in one stepFour-cutter countersink and tapered drill bit provide superior speedFour-cutter countersink and tapered drill bit provide superior speed and ideal finish #8 countersink with 11/64 in. drill bit