3pc Titanium Hss Stepped Down Drill Step Drill Bits Set 1/4"Metric 4-12mm 4-20mm 3-12mm Hex Shank

Features: Automatically deburrs holes as you drill. The two-flute design gives you faster, smoother cutting With titanium nitride coating for cooler running Quick-change 1/4" hex shank High speed steel for long life These step drill bits are ideal for variety of materials from metal, plastic, fiberglass and wood They also help to enlarge existing holes The two flute design tips made the penetration faster without chipping Description: Material: HSS 1/4" hex shank Sizes: metric 4-12 mm: 4, 6, 8, 10, 12 mm 4-20 mm: 4, 6, 8, 10, 12, 14, 16, 18, 20 mm 3-12 mm: 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 mm 4241 high-speed steel HSS (suitable for use In the workplace, hardness of 25 degrees such as carbon steel, plate, insulation board, wood board)   Packaging in an Oxford bag   Ideal for ALL drills Made in 4241 high-speed steel HSS   1/4" hex shank