The Fein WSG17-70RT 5" Angle Grinder features the 1500 watt, 5" wheel diameter max, ErgoGrip for fatigue-free work, AutoStop switch, HO7 industrial strength rat tail cable, and full metal gear head that are used for grinding for a long peroids of time that due to the light weight of the grinder. It also has the self-start lock, soft start, and electronic overload protection due to the KickBack Stop.