Step drills are used for cutting varying hole sizes in material up to 4mm thick without changing the drill bit. Each drill cuts parallel holes within a specific size range, rising in 2mm increments.FAISDSET3, 3 Piece: 4-14mm, 6-20mm and 6-30mm, supplied in a metal storage case. Features: Each drill cuts parallel holes within a specific size range, rising in 2 mm increments Specifications: Dimensions: H:15.0 x W:2.0 x D:7.3 cm Colour: Silver Guarantee:5 years Material: Hss Model Number: FAISD620
