The NiTi K-file has one cutting edge with a 90° angle, with its unique spiral design flutes which it successively increase in depth and length from tip to handle. Specially designed for curved root canals with flexibility, durability, and cutting ability. Extraordinarily sharp and mirror-like finished edges with high ductility make for excellent working characteristics. Made of high quality Niti Alloy. With precise processing technology, products in good flexibility, high quality cutting efficiency and fracture resistance. Progressive taper design improves flexibility and cutting efficiency, especially in tighter or more curved canals. With fixed plastic washerand handle. High-temperature sterilization is allowable.”