FAMAG 2597 long‑version twist drill bits are fully ground from a single piece of high‑speed steel (HSS‑G) and equipped with a 1/4″ (E 6.3 mm) hex shank for quick‑change compatibility. Their 118° conical point ensures self‑centering starts and clean entry holes, while polished flutes evacuate chips efficiently—delivering extended tool life in alloyed/non‑alloyed steels (up to 900 N/mm²), cast irons, and engineering plastics.

📊 Product Information by Diameter

5-Piece set in PVC Box - includes drill bits Ø 3, 4, 5, 6, 8 mm

🛠️ One‑Piece HSS‑G Construction

• Solid‑ground HSS‑G body resists wear and maintains sharp cutting edges under high torque.
• No welded or brazed joints—ensures maximum durability and consistent performance.

🎯 Precision 118° Point Angle

• Self‑centering tip prevents “walking” at startup.
• Produces burr‑free entry holes without pre‑drilling pilot guides.

⚙️ 1/4″ (E 6.3 mm) Hex Shank

• Fits standard bit holders, quick‑change chucks, and impact drivers.
• Secure grip under load enables rapid tool swaps.

🚀 Polished Flutes for Efficient Chip Removal

• Ground and mirror‑polished helical flutes clear chips rapidly.
• Reduces heat buildup and prevents clogging during continuous drilling.

🌲 Versatile Material Compatibility

Ideal for drilling:

• Alloyed & non‑alloyed steels up to 900 N/mm²

• Grey & malleable cast irons

• Engineering plastics (e.g., polycarbonate, acrylic)

⚠️ Safety & Maintenance

• Always clamp workpieces securely and wear eye protection.

• Clear flutes of debris between uses and replace bits when cutting edges dull.

• Use lockable bit holders to prevent binding in deep holes.

✅ Who It’s For

Perfect for machinists, fabricators, and DIY enthusiasts seeking precision, durability, and clean results in metal and plastic drilling.