Faithfull Step drills are used for cutting varying hole sizes in material up to 4 mm thick without changing the drill bit. Each drill cuts parallel holes within a specific size range, rising in 2mm increments.
Sizes 4 to 14 mm. Increments of 2.0 mm.
Max thickness 4 mm.
Made from HSS ( High-Speed Steel ).
Shank: 6 mm diameter.