Vibration Control Handle n++ Reduces vibration up to 60 percent, providing uncompromising comfort for extended periods of work. Paddle switch without lock-on. AC/DC capability n++ Extends the versatility of the tool by working from DC outlets such as welders and generators. Sealed switch n++ Keeps debris out of the switch mechanism and extends switch life. ServiceMinder brushes n++ Eliminates guesswork, stops the tool when preventative maintenance is required. Epoxy Coated Field Windings n++ Provides ultimate protection against abrasive dust and metal debris. Directed Air Flow n++ Unique design diverts dust away from switch and vital components. Spindle Lock n++ For quick wheel changes. 5/8-11 Spindle n++ wide flexibility for mounting most popular accessories. Tool-free adjustable guard n++ Quick guard installation and adjustments.