The High Speed Steel Burs, Size 15 (3.8 mm) Heart 45° is a professional-grade cutting tool designed for jewelers who demand precision, durability, and high-performance in stone setting and metal shaping. Crafted from premium High Speed Steel (HSS), this bur ensures superior hardness, long-lasting sharpness, and consistent cutting power even during extended high-speed operation.

The 45° heart-shaped tip allows jewelers to create precise stone seats, smooth undercuts, and refined contours essential for prong, bezel, and flush settings. The 3.8 mm (Size 15) diameter is perfect for larger stone settings, deeper cuts, and efficient shaping of medium-to-large metal areas while maintaining exceptional control.

Spiral-cut flutes optimize chip removal, reduce heat buildup, and prevent clogging, ensuring smooth, clean cutting every time. The tool features a 3/32″ (2.35 mm) shank, making it fully compatible with standard flex shafts, micromotors, and rotary jewelry tools.

This heart bur is ideal for stone setters, bench jewelers, engravers, and jewelry designers who need precise control, professional-level finishing, and reliable tool longevity.

Key Benefits

• Durable Construction: Made from High Speed Steel for long-lasting sharpness and excellent heat resistance.

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

• Smooth Cutting Performance: Spiral flutes minimize clogging, remove debris efficiently, and maintain cooler operation.

• Optimal 3.8 mm Size: Size 15 offers deeper cuts and greater control for large stone settings.

• Standard 3/32″ Shank: Compatible with all major jewelry rotary systems.

• Professional Results: Ensures clean contours, precise seat formation, and reduced finishing time.