Endo Ring Ruler, Ambidextrous is specifically designed for precise measurement in all endodontic treatments. Its convenient ring style means easy access and comfortable use both by right- and left-handed operators. Gradations of 0.5 centimeters and millimeter are well-contrasted on the entire length of 3.5 centimeters of this ruler, allowing easy, correct determination of file length,... https://new-medinstruments.com/endo-ring-ruler.html