The High Speed Steel Burs, Size 11 (2.9 mm) Heart 45° is a premium-quality cutting tool engineered for professional jewelers who require accuracy, durability, and consistent performance in stone setting and fine detailing. Made from superior High Speed Steel (HSS), this bur offers exceptional hardness, long-lasting sharpness, and reliable cutting capability even during extended high-speed operation.

Featuring a 45° heart-shaped cutting geometry, this bur is ideal for creating precise stone seats, controlled undercuts, clean relief cuts, and refined contours. The 2.9 mm (Size 11) diameter gives jewelers a slightly larger cutting surface—perfect for deeper seats, secure gemstone placement, and shaping medium-to-large design details with maximum control.

Engineered with spiral-cut flutes, this bur minimizes heat buildup, reduces clogging, and ensures smooth chip evacuation. This results in cleaner cuts, a higher-quality finish, and improved workflow efficiency. The industry-standard 3/32″ (2.35 mm) shank ensures compatibility with all major jeweler’s flex shafts, micromotors, and rotary tools.

This professional-grade heart bur is ideal for stone setters, bench jewelers, engravers, and designers who demand high precision, clean finishing, and dependable tool life for both soft and hard metals.

Key Benefits

• Superior Durability: Crafted from High Speed Steel for long-lasting performance and exceptional heat resistance.

• Precision 45° Heart Profile: Offers accurate shaping for stone seats, undercuts, and detailed metalwork.

• Smooth Cutting Efficiency: Spiral flutes enhance cutting speed, reduce clogging, and keep the bur cool.

• Optimal 2.9 mm Size: Size 11 offers increased cutting depth and better control for larger stone settings.

• Universal 3/32″ Shank: Fully compatible with professional jewelry rotary systems and flex shafts.

• Professional-Level Results: Achieves secure stone seating, clean contours, and reduced finishing time.