Retiton Cutting Wheel Kin no Tamago 105x1.0x15 3 boxes, 30 pieces per box, unused/unopened Abrasive grain, grit, hardness: AZ60P Maximum operating speed (m/s): 80 Maximum rotation speed (rpm): 14400 This product is new, unused, and unopened. There may be some scratches on the outer box due to warehouse storage, but there is no problem with the product's performance. I have many other items for sale. Thank you for your consideration.