Whiteside #10 Countersink Bit

Whiteside 4 Flute, 82-degree Adjustable #10 Countersink, High Speed Steel, 1/2″ Outside Cutting diameter, 13/64″ Inside Diameter (for 13/64″ center drill), for countersinking holes for a #10 size screw. 

• Wood Screw size: #10
• Countersink Diameter: 1/2″
• Made in USA
• Replacement tapered bits available