Feature: 1. FUNCTION: This professional endodontic block files bur holder is used for dental endodontic measurements and for placing dental root canal enlargement needles, which is convenient and safe to use. 2. CLEAR SCALE: This endodontic block files bur ruler has a clear scale for accurate measurements, so you don't have to worry about the scale lines getting blurred after using it for a long time. 3. DENTIST'S HELPER: This safe and durable dental burs ruler can hold multiple root canals for dental root canal measurements, reliable and safe, a good helper for dentists. 4. PLASTIC: Made of high strength plastic material, the reliable and durable structure is designed for dental use and is a long lasting Dental Burs Ruler. 5. SAFE TO USE: This endodontic block files bur holder made of high strength plastic can withstand 135 ℃ high temperature and high pressure, safe to use and can be purchased with confidence. Specification: Item Type: Dental burs ruler.Material: PlasticColor: White Package List: 1 x Dental Burs Ruler