In one step, you can drill, countersink and counterbore the perfect sized hole for #4, #6, #8, #10, or #12 screws.
Counterbores are 3/8" or 1/2" diameter. Ideal for plugs or dowel buttons. The 1/4" hex shank can be used with power drills and quick change chucks.

Features:
• Drill, countersink, and counterbore holes in one step
• Use for plugs and dowels
• 1/4" hex shank
• Can be used the power drills
• Use with quick change chucks