-Special technology of sand-planting, combine firmly and no sands drop, high grinding efficiency. Think strips, good toughness and high strength, no deformation after rotary grinding. The handle of disc with good flexibility and elasticity, contact with the disc tightly autoclavable. -Assorted Of : Coarse, Medium, Fine, Super Fine ( 25 Pcs each) Total 100 pcs. Mandrel 4 pcs . **For further product information, please contact Chat Support**