Professional step drill TECOS of Sweden in 3 different models . Works great in stainless materials Made in M35 HSS steel, 10 mm shank Tecos Step Drill in high alloy M35 HSS Steel. Step drill with self-centered drill tip. Double cutters provide less drilling pressure, faster drilling and longer life. 10 mm shank with 3 edges for optimal grip and power transmission from the drill bit. Ideal for drilling holes in thin materials such as mild steel, copper, brass, aluminum, plexiglass, plastic, wood and laminate. Step drill Centers, pre-drills and deburrs thin materials using a high-strength drill tip with special grinding. High quality as the drill is made of heat-treated HSS Steel. Safe and friendly to the work environment as the single seated blades prevent vibrations Less risk of cracks on the tool's blades due to the fine structure and the fine-grained material structure Large time savings due to many fixed steps (dimensions) Areas of use Suitable for most materials, especially thin sheet metal. All drills, pillar drills and processing machines - at low speeds can be used. Do not forget to use cooling and lubrication with drill paste