Step drill bit by STHOR 22612 Designed for drilling in high-grade stainless, structural and cold-rolled steel, non-ferrous metals, steel sheets, plastics. • the edges of the drilled hole remain clean and without burrs• the drill bit does not escape on rounded surfaces• self-centering on rounded and slippery surfaces• the drill bit is easy to use• fast heat dissipation when drilling in hard materials• made of HSS high-speed steel coated with titanium nitride• stepped in 2 mm increments• Cylindrical shank.
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