Faithfull FAISDSET3 HSS Step Drill Bit Set of 3 4-30mm 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. Made from HSS ( High Speed Steel ). Set of 3 consisting 1 of each 4-14 mm, 6-20 mm, 6-30 mm. Supplied in a metal case.
