VentSure 11 in. x 20 ft. Ridge Vent Rigid Roll with Weather PROtector Moisture Barrier Lawn Mowers Corded Electric Spindle Lock Amperage (amps) 0 Spindle Lock Amperage (amps) 0 A Returnable 180 Day Cordless Corded Cordless Battery Power Type Lithium Ion Variable Speed No Electronic Speed Control Yes Charger Included Charger Not Included Tools Product Type Power Tool Cordless Tool Type Angle Grinder Number of Batteries Included2 1 Maximum Speed (rpm) 6600 Condition New Grinder Switch Type Trigger Batteries Included Yes Motor Type Brushless Battery Charger 1 Battery Included Voltage (volts) 18 Arbor Size 5 8 11 in features a Brushless motor which provides 5200 RPM maintaining speed under load Owens Corning Hip & Ridges shingles and two additional Owens Corning roofing accessories must be installed End caps are provided in each roll