The FG 331 is a pear tungsten carbide bur on an FG friction-grip (high-speed handpiece), designed for conservative Class I and II cavity preparation. Shape: Pear (ISO figure family 830 / carbide 330·245) Material: Tungsten Carbide Shank: FG friction-grip (high-speed handpiece) Sterilizable, single-use friendly; consistent quality at clinic-friendly pricing Cross-reference: built to the standard 331 bur number standard — a direct match for any brand's 331 pear bur, including Brasseler, Komet and SS White. Match the head-size and grit to replace your current bur.Not sure this is the right bur? See our Bur Cross-Reference & Usage Guide or email [email protected] with the number you currently use.