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Drills without making punch marks even on round material and combines hardness with flexibility with excellent durability. Also for stainless steel materials. High quality HSS cobalt drill for a wide range of materials. Self-centring. Drills without centre punching, even on curved surfaces; non-slip. Can withstand extreme heat. Specially designed for alloyed and non-alloyed materials and rustproof materials with a tensile strength above 800N/mm2. Highly durable and flexible, giving better value for money. A very practical set from 1 mm to 13 mm and sizes for the screw taps (M3-4-5-6-8-10-12). An outstanding drill that satisfies most repair and maintenance needs.