RYOBI 40 Volt HP Brushless 21 in. Cordless Battery Walk Behind Dual Blade Self Propelled Mower (Tool Only) Impact Socket Set 75 Arbor Diameter 5 8 in Threads 75 Arbor Diameter 5 8 in Threads Per Inch 6 For Use with Concrete & Masonry No For Use with Aluminum No For Use with Tile No For Use with Stainless Steel Yes For Use with Ductile Pipe No For Use with Asphalt No For Use with Ferrous Metal Yes Package Quantity 1 Warranty 90 day CA Residents: Prop 65 Warning(s) No For Use with Cut Off Saws No For Use with Angle Grinders No For Use with Chop Saws No For Use with Circular Saws No and enhancing user safety during extended periods 5 in Mower Size Type Standard Number of Batteries Required 1 Number of Blades 2 Number of Handlebar Positions 2 Number of Total Batteries Included 2 Power Type Battery Product Weight (lb Keyed start