Drills with the ETCB Original logo are officially tested, certified, and belong to the absolute top in the field of metal drilling. Professionals at home and abroad deliberately choose these original ETCB drills because they can rely on maximum performance and an exceptionally long lifespan — even in the most demanding applications.
The ETCB Cobalt drills are made from high-quality HSS steel with 5% cobalt, making them extra wear-resistant and heat-resistant. The 4 mm version is particularly suitable for medium-sized holes in stainless steel, hardened steels, alloys, cast iron, and other hard materials. This size offers an excellent balance between precision and strength, making it ideal for metalworking, sheet metal, and general maintenance applications.
Features:
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Made from high-quality HSS with 5% cobalt
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Long lifespan and high heat resistance
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Precise and clean holes
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Suitable for both manual and machine use
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Officially tested and certified
With the original ETCB Cobalt drills, you choose quality and reliability, so you can always trust your tools — even in the most critical situations.
