Features:With a drill or high power electric grinding can use as the grinder.With electric drill soft shaft can use as electric grinding.Easy to operate, convenient to use.The electric drill power is bigger than actual electric grinding power,more suitable to use.Light weight and convenient, necessary for family and small factory.Specification :Size : Electric drill electric grinder length : 240mmAnnular jaws opens : 35-43mmMaximum diameter of bolt: 53mmMaterial : MentalColor : silverPackage includes : 1 x Clamp-on bench vise(package not include the Grinder) Notes:1. Please allowed 1-3mm differences due to manual measurement, thank you!2. Due to the difference between different monitors, please understand that the picture may not reflect the actual color of the item.