The Faithfull High Speed Steel Rosehead Chubby 90° included angle Countersink is used for countersinking screw holes for flush fitting of screw heads in mild steel, plastics and non-ferrous metals.
They are also suitable for working on wood, plywood, MDF, and other man-made boards. They can be used in both hand tools, and power drills.

Specifications:

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