1Prevent Injury: Dental disc mandrel rod has 1.8inch length, which can effectively reduce injury and complications and it is safe for dentists to use. 2Speed Range: Dental mandrel shank has recommended speed that is 30007000r/minis, which is suitable for dental hospitals and clinics to use. 3Quantity: Dental abrasive mandrels shank has 10pcs quantity, which is enough for you to use, if there are broken or old rod, you can use it to replace. 4High Efficiency: Dental disc mandrel rod has high hardness material, improving the efficiency of the dentist and it is a good work helper for them. 5Stainless Steel: Dental lab polishing mandrel is constructed with durable material, with high strength, dustproof and to use for a long period of time.e.