The High Speed Steel Bur – Size 9 (2.5 mm) Inverted Cone is a professional-grade cutting and shaping tool engineered for jewelers, engravers, and craftsmen who need precision, control, and long-lasting sharpness. Manufactured from premium high-speed steel, this bur stays sharp significantly longer than conventional vanadium burs, delivering exceptional performance under high RPMs and continuous use.

The inverted cone shape is specifically designed for clean undercuts, shaping, engraving work, stone seat carving, and fine detailing. Its compact Size 9 (2.5 mm) head diameter offers excellent maneuverability in tight areas while providing smooth and controlled metal removal.

With its strong heat resistance, the bur maintains its sharpness even at 10,000–20,000 RPM, making it ideal for demanding jewelry workshops. The universal 3/32" shank fits all major rotary tools, flex shafts, and micromotors, ensuring compatibility for both professional and hobbyist users.

This bur can be used on a wide range of materials including wood, metal, plastic, and stone, making it suitable for jewelers, craftsmen, engravers, and stone setters who require accuracy in their detail work.

Key Benefits:

• Long-lasting high-speed steel construction provides superior wear resistance.

• Inverted cone design delivers accurate shaping, engraving, and undercutting.

• Size 9 with 2.5 mm diameter ideal for tight-area detailing.

• Compatible with all 3/32" rotary tools used in jewelry and craft work.

• Effective on multiple materials—metal, wood, plastic, stone.

• High heat resistance for stability at elevated RPMs.

• Perfect for stone setting, engraving, and precision finishing.