Description HSS-E cobalt twist drill set 6pcs. 5% cobalt alloy twist drills with reinforced core diameter. Especially suitable for tough and hard materials such as rust- and acid-resistant chromium-nickel steels. Technical data: drill type (categorization): metal twist drill set DIN standard: DIN 1897 content: 1 set material (drill): HSS-E material property: cobalt material suitability: metal, stainless steel, non-ferrous metals tool holder (drill): cylindrical shank tensile strength (max.): 1300 N/mm² box contents: Ø 2/3/4/5/5/6/8 mm