Retiton Cutting Wheel Kin no Tamago 105x1.0x15 30 boxes, 300 pieces total, 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. We have many other items for sale. Thank you for your consideration.