The FGXL 557 is a straight fissure tungsten carbide bur on an FG friction-grip (high-speed handpiece), designed for cavity preparation, sectioning and bulk removal. Surgical-length (FGXL) shank for extended reach. Shape: Straight Fissure (ISO figure family carbide 556·557·558) 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 557 bur number standard — a direct match for any brand's 557 straight fissure 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.