Step Drill Bit - HSS Titanium Coated - For Metal Wood Plastic - 4-12 mm 4-20 mm 4-32 mm - 3 Pieces

Step drill bit set for precise, multi-diameter hole drilling in sheet metal, wood, plastic and soft alloys — ideal for DIY, maintenance and workshop use.
HSS (High-Speed Steel) core with titanium nitride coating reduces friction, improves heat resistance and extends tool life during repeated use.
Spiral double-flute design ensures smooth chip removal and step drill bit self-deburring — cleaner holes with less post-processing.
6.35 mm (1/4") hex shank fits standard drill chucks and impact drivers — quick, secure installation without slippage.
Laser-engraved size markings (4–12 mm / 4–20 mm / 4–32 mm), total set weight: 280 g, dimensions: 15 × 3 × 2 cm (bag included), color: gold-grey — packaged in durable nylon storage pouch.This step drill bit set includes three high-performance step drill bits: 4–12 mm, 4–20 mm and 4–32 mm — designed for clean, accurate holes in thin metal sheets, wood, plastic, aluminum and copper. Made from hardened HSS with titanium nitride coating, each step drill bit delivers consistent performance and wear resistance. The spiral double-flute geometry supports efficient chip ejection and automatic burr removal. With a universal 6.35 mm hex shank, it installs easily in most power drills. Laser-etched sizing ensures long-term readability. Includes compact nylon storage bag for safe organization. Suitable for home workshops, electricians, HVAC technicians and metal fabricators.