6Pcs High Speed Steel Hex Shank Drill Bits | Spiral Notch Design for Faster Cooling & Drilling | M3 - M10 Tap Chamfer for Metal/Wood/Plastic | 1 / 4in Hex Shank Fits Most

Produktbeschreibung

Industrial-Grade Hardness - These high-speed steel drill bits are 30% harder than standard HSS, providing enhanced durability and 2X longer lifespan for demanding machining tasks. Spiral Notch Cooling System - Fully ground spiral design efficiently clears metal particles during drilling, reducing friction by 40% and avoiding overheating in continuous use. Universal 1/4in Hex Shank - Accurately-machined hex shank fits all standard-grip drills and drill presses securely, minimizing bit slippage even at maximum RPM (compatible with leading brands). Multi-Material Performance - Specially engineered for soft metals (5mm), wood and plastics with auto-centering points that reduce the need for pilot holes - ideal for DIY and expert workshops. Complete Sizing Kit - Includes 6 most-used sizes (M3-M10) with chamfered edges for simultaneous drilling and tapping, saving 50% working time compared to separate tools.