2 Flute Spiral Step Drill4-12mm Drills & deburrs in one processIdeal for: Non-ferrous metals, sheet steel, plastic & stainless steel up to 3mm thickSuits: Non-hammer action portable power drills Self-starting split point removes the need for a pilot hole 2 flute design for smooth cutting TiN coating reduces heat & increases lubricity for extended life Laser etched hole Premium HSS M2 raw material for extended life 3 flats on shank, prevents slippage in chuck Hangable 1 piece plastic card Technical information: Number of steps: 9 steps Step sizes: 4, 5, 6, 7, 8, 9, 10, 11 & 12mm 6.0mm shank Also available in bulk 1 piece convenient plastic pack Code: 9STSFM4-12S