5-inch Angle Grinder with Paddle Switch. "SJS" (Super Joint System) prevents kickback during wheel lock up for optimal tool and operator protection. Electronic current limiter protects motor from accidental overload. Removable side handle can be mounted on left or right side of tool. Tool-less wheel guard adjustment. Active Feedback sensing Technology (AFT) automatically shuts down the tool if there is a sudden drop in rotation speed (e.g. kick-back). Anti-restart feature prevents accidental start up of tool during battery changing when switch is locked in the on position. Soft start feature gradually increases speed to eliminate start up shock. Constant speed control automatically applies additional power to the motor to maintain speed under load.