-A convenient way to hold endodontic instruments and canal lubricant during a procedure. -The EndoRing features an easy-to-read ruler with rubber stop port, allowing quick measurements of files up to 30mm (at 1 and .5mm increments) for both right and left-handed clinicians. -The EndoRing as well as the foam inserts are autoclavable **For further product information , please contact Chat support**