4 Flute Spiral Quick Release Step Drill1/4 - 3/4 inch 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 4 flute spiral design cuts faster with less vibration for fast, clean & accurate holes TiN coating reduces heat & increases lubricity for extended life Laser etched hole Premium HSS M2 raw material for extended life Non-slip 1/4 inch quick change shank Hangable 1 piece plastic card Technical information: Number of steps: 9 steps Step sizes: 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16 & 3/4 inch 1/4 inch shank