ERGO insert with a large diameter and a soft silicone handle to reduce clinician hand fatigue. Comfortable, textured handle is 18% larger than Acclean® PRO resin inserts for an easier, more secure grip. The efficient internal-flow water-delivery process runs water to the treatment site through the base of the tip for easier maneuverability in hard-to-reach areas than with an external water tube. 90-day warranty.