NTI Diamond Disc Double Sided Handpiece D918B-220 22 mm Each Contours and shapes restorative materials. Ideal for anterior and posterior teeth veneers. Uses less heat for optimum performance. Minimizes breaks and cracks. NTI Flex Diamond Disc integrates the Unimatrix Bonding process to fabricate, contour, and shape dental restorative materials. The premounted disc has a 44.5 mm x 2.35 mm HP shank provides better control during use.NTI Flex Diamond Disc comes individually packed for safety and convenience. Available in various grits, sizes, and shapes.