Hexagon Shank Straight Groove Step Drill Pagoda Drill Step High Speed Steel 4241 Drill Bit Set 4-32 4-20 4-12

Material: high speed steel 4241 (suitable for workpieces with hardness below 25°, such as carbon steel)Specifications: 4-32mm (4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28,...