HSS TiN Step Drill Bit Set 3-20 mm Hex 3 pcs

Set of three step drill bits made of high-speed steel HSS, TiN coated, 1/4 HEX shank. Diameters: Drill bit 3-12 mm, steps: 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 mm. Drill bit 4-12 mm, steps: 4, 6, 8, 10, 12 mm. Drill bit 4-20 mm, steps: 4, 6, 8, 10, 12, 14, 16, 18, 20 mm.