Voltage : 20 Wheel Diameter : 4-1/2 In. Battery Type : Lithium-Ion Motor Type : Brushless Battery Platform : DEWALT 20V MAX Width (In.) : 4.72 Height (In.) : 4.5 Weight (Lb.) : 3.92 Length (In.) : 12.8 Batteries Included : No Charger Included : No Case Included : No Warranty : 3 Year Corded/Cordless : Cordless Maximum Speed : 9000 rpm Arbor Size : 5/8 In.