Metabo WEPA14-150 Quick 9,000 RPM 12.2 AMP 6-Inch Non-Locking Paddle Switch Angle Grinder With Auto Balancer Integrated auto-balancer for minimal vibration and longer tool life for grinding discs Protect safety switch: Safe to operate due to an ergonomically integrated large paddle switch Dead-man function: Immediate shutdown of the machine when the switch is released Electronic soft start Metabo "Quick" tool quick change