The 2.35mm and 3.0mm Shaft Diamond Round Ball Shape Burs are precision-engineered tools designed for smooth contouring, hollowing, and detailed sculpting on hard materials such as glass, ceramics, gemstones, bone, and hardwoods. Featuring a spherical tip with galvanically bonded diamond grit, these burs excel in creating rounded grooves, concave surfaces, and intricate 3D designs with precision.