The 7.8 amp motor operates at 11,000 rpm and generates 995 watts of output. The metal gear case dissipates heat for longer bearing, gear, and motor life, and the AC/DC capacity works off of welding machines and generators for increased productivity and versatility. Other features include a sliding sealed switch, two-position side handle, and spindle lock. Your purchase includes grinder, depressed center wheel, wrench, backing flange, clamp nut, and keyless adjustable guard. Features: 9.0 amp, 11,000 rpm operating speed for high power in all 4-1/2-inch grinding applications Metal gear case dissipates heat for longer bearing, gear, and motor life Sealed switch and ball and roller bearings Sliding switch for extended use applications Keyless adjustable guard allows for easy positioning of safety guard Specifications: Amps: 9.0 AC/DC amps Max. watts out: 995 watts No-load speed: 11,000 rpm Use wheels rpm above: 12,100 rpm Spindle lock: yes Spindle thread: 5/8 inch-11 Tool length: 11.4 inches Tool weight: 4.5 lbs. each Includes: 2-position side handle Depressed center wheel Wrench Backing flange Clamp nut Guard Warranty: This DeWalt high-performance industrial tool comes with a warranty package that includes: 30-day, no-risk satisfaction guarantee One-year free service contract One-year warranty