Wolfcraft 2590405 Screwsetter Bit Set, 4-Piece, For Portable Drills and Drill Presses

Drill, countersink and counterbore in one easy operation also allows flathead screws to sit level with the wooden surface and is adjustable allowing for different hole depths. Drilling deeper creates a counterbore for the use of a wooden plug. Use with portable drills and drill presses. Includes, #6, #8, #10 and #12 screw setter.