NeoBurrĀ® FG 331L Long Head Pear Operative Carbide Bur by Microcopy (USA). Engineered from a single piece of solid tungsten carbide with a standard friction grip shank and an extended 3.7 mm pear-shaped cutting head. Specifically designed for deep cavity preparation, conservative extension into deeper dentinal caries, and smooth axial wall shaping with continuous rounded internal line angles in Class I and Class II direct restorations.