HSS Step Drill Set, 3 Piece

2 stepped drill bits with the dimensions 4 – 12 mm and 4 – 30 mm and 1 milling drill bit Ø 6 mm in professional quality; stepped drill bit: with steps in the most common drilling diameters, with spud tip, to drill small to larger diameters without pre-drilling, even in the thinnest sheets, with an edge-breaker for burr-free results; routing drill bit: for drilling and milling, to achieve elongated holes and expand drilling holes, all drill bits of the set are made from HSS steel, titanium-nitrided surface, for steel sheets, non-ferrous metals and plastics, in a blister storage bag.