IRWIN 15-Piece Cobalt Drill Bit Set 1.5-10 mm HSS M35 Split Point DIN 338

Drilling into tough materials like stainless steel or hardened alloys quickly dulls standard bits, leading to frustration and wasted time. This 15-piece cobalt drill bit set from IRWIN solves that problem with M35 cobalt HSS construction that stays sharper longer and resists heat, even under heavy use. Whether you're a professional or a serious DIYer, you'll get clean, accurate holes in a wide range of metals.

Who is it for

This set is ideal for metalworkers, mechanics, fabricators, and advanced home users who regularly drill into stainless steel, high-tensile steel, cast iron, and non-ferrous metals. It's perfect for use with both corded and cordless drills, making it versatile for workshop or on-site tasks.

Main features

• 15 precision-ground twist drill bits in sizes from 1.5 mm to 10 mm, covering the most common hole diameters.
• Made from M35 cobalt high-speed steel (5% cobalt) for superior hardness, heat resistance, and durability.
• 135° split point tip starts on contact, reduces walking, and requires less pressure for faster drilling.
• Straight shank design fits standard drill chucks securely.
• DIN 338 standard ensures consistent quality and dimensions.
• Supplied in a sturdy metal storage case for organization and protection.

Specifications

• Set type: Drill bit set
• Number of pieces: 15
• Material: HSS Cobalt (M35)
• Diameter range: 1.5 mm – 10 mm
• Individual sizes: 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 8, 9, 10 mm
• Shank type: Cylindrical (straight)
• Point angle: 135°
• Point type: Split point
• Flute type: Standard spiral
• Recommended materials: Stainless steel, high-tensile steel, cast iron, hardened steel, non-ferrous metals
• Storage case: Metal
• Standard: DIN 338
• Manufacturing process: Precision ground
• Suitable for: Corded and cordless drills
• Durability: Heat and abrasion resistant

Tips

For best results, use cutting fluid when drilling hard metals to extend bit life and improve hole quality. Start with a center punch to prevent wandering, and apply steady, moderate pressure. Store bits in the case after use to keep them organized and protected from damage.