In mild steel, plastics, and nonferrous metals, the Faithfull High Speed Steel Rosehead Chubby 90 degree included angle Countersink is used for countersinking screw holes. They are also suitable for working in wood, plywood, MDF, and other man-made boards, and can be used in both hand tools, and power drills.

Type: Rosehead - Chubby. Size: 13mm (1/2in). Shank Diameter: 6mm (1/4in).