Pro Max Impact Ready Spiral Flute Cobalt Step Drill Bit. -M35 Cobalt, TiAlN Coated. Engineered with a Four Spiral Flute design for faster and smoother cutting. Includes a comprehensive range of 15 step sizes from 4mm to 32mm (4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32).
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