Draper Step Drill Bit, 4 - 30mm - SD4-30Step drill bit with 2mm increments perfect for drilling into steel, brass, copper, aluminium, wood and plastics. Manufactured from good quality high speed steel, correctly hardened for a longer life. Drill steps marked at graduations: 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30mm. Display packed. Key Features Versatile step drill bit designed for precision drilling in steel, brass, copper, aluminum, wood, and plastics, making it ideal for
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