“…WaveOne Gold (WOG) (Dentsply Maillefer, Baillagues, Switzerland) is a gold-treated single-file system with a parallelogram cross-section and an off-center design, manufactured using several heating–annealing cycles in the gold alloy after milling. [ 3 ] Available in four different sizes; as small - #20, primary - #25, medium - #35, and large - #45 with variable tapers. EdgeOne Fire (EOF) (EdgeEndo, Albuquerque, New Mexico, USA) files have a similar cross section to WOG and are manufactured using an annealed heat-treated NiTi alloy, brand named FireWire™, which offers high flexibility.…”