Made of HSS high-speed steel drills for metal Parameters in accordance with din 338, surface hardened with titanium nitride / gold color / Extremely durable and resistant, designed for drilling in stainless and acid-resistant steel The set includes 13 drills of diameter [mm]: 1, 5; 2, 0; 2, 5; 3, 0; 3, 2; 3, 5; 4, 0; 4, 5; 4, 8; 5, 0; 5, 5; 6, 0; 6, 5.