Metabo WEV15-125 HT Lock-On 13.5 Amp 2,800-9,600 rpm Angle Grinder with Electronics and High Torque, 4.5"/5" Metabo LongLife motor with up to 50% more torque for quicker material removal, up to 20% higher overload capacity Electronic Variable Speed dial to match the RPM of the tool to the requirements of the application Metabo S-Automatic safety slip clutch helps the user to maintain control if the accessory jams reducing the likelihood of kickback Electronic overload protection which helps protect the tool from overheating in demanding applications providing long service life Electronic soft start for smooth startup, increased user control, and extended motor life