STEIN Professional 5-Piece Cobalt Drill Bit Set 4–10 mm DIN 338

🛠️ Cobalt drill bits — a level above standard HSS
📏 5 sizes: 4, 5, 6, 8, and 10 mm — the most commonly used in metal
📐 Manufactured according to DIN 338 standard
🔥 High heat resistance — maintains sharpness longer
📦 Set of 5 pieces for demanding technical jobs

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When HSS is not enough

STEIN cobalt drill bits are designed for jobs where conventional drill bits wear out quickly. Their cobalt content gives them superior thermal resistance, keeping the cutting edge active for longer even in long drilling operations or in hard materials.

Manufactured according to DIN 338 standard, they guarantee dimensional precision and professional reliability. Includes the 5 key sizes (4, 5, 6, 8, and 10 mm) to cover most technical jobs in metal, stainless steel, and alloys.

⭐ Main advantages

✅ Cobalt — greater durability and thermal resistance than standard HSS
✅ Maintains sharpness longer in demanding drilling operations
✅ DIN 338 standard — guaranteed precision and quality
✅ 5 key sizes: 4, 5, 6, 8, and 10 mm
✅ Ideal for metal, stainless steel, and alloys

🔵 Recommended uses

🔵 Drilling in metal and stainless steel
🔵 Working on alloys and hard materials
🔵 Workshops and professional maintenance
🔵 Advanced DIY and technical repairs
🔵 Professional toolbox