4.0mm Round-Edge Wheel Diamond Bur, 100pcs – 80 Grit Precision Carving Tool for Gemstone, Stone & Glass

4.0mm Round-Edge Wheel Diamond Burs (100-Piece Bulk Pack, 80 Grit) are precision grinding and profile carving tools engineered for lapidary artists, jewelers, and glass workers. Featuring a contoured round-edge wheel profile coated with durable 80 grit electroplated diamond on a standard 2.35mm (3/32") shank, these burs are ideal for shaping grooves, rounding edges, carving channels, and detailing gemstone, stone, glass, and ceramic surfaces.

• Head Size: 4.0mm round-edge wheel
• Grit: 80 Grit for aggressive, clean material removal
• Shank Diameter: 2.35mm (3/32") standard rotary tool fit
• Quantity: 100 pieces per bulk pack
• Bond & Abrasive: Premium electroplated diamond coating
• Applications: Gemstone carving, groove shaping, edge rounding, channel cutting, and glass engraving

Always use water or coolant during operation to prolong tool longevity and maintain clean cutting performance.