The 9 in. Large Angle Grinder with Guard, 6000 RP has Vibration Control Side & Rat Tail Handle it also features a tool-free adjustable guard for quick guard installation and adjustments. Vibration Control Side and Main Handles: Reduces vibration up to 60 percent , providing uncompromising user comfort for extended periods of work. AC/DC capability : Extends the versatility of the tool by working from DC outlets such as welders and generators.