EdgeOne Fire™ features our Heat-Treated Fire-Wire™ NiTi and is designed to shape canals in a reverse-reciprocating motion. EdgeOne Fire works with existing handpieces. EdgeOne Fire tests at five times the cyclic fatigue as the main competitors.EdgeOne Fire™ is available in sizes Small, Primary, Medium, and Large. Files have a parallelogram shaped cross section with a variable taper. There are three files in each pack with the option of an assortment pack or single sized pack. Available in lengths 21mm, 25mm and 31mm.