Disk kits featuring a longer service-life and an increased stiffness, while also maintaining flexibility in interproximal areas. Used for the polishing of micro-filled and hybrid composites. X-treme Disk Kit includes Disks x 160 (Super-Snap, Super-Snap X-Treme), Dura White Stones x 2 (CN1, FL2), CompoSite and CompoSite Fine Midipoint, and CA Steel Mandrels x 4.