SJS (Super Joint System) prevents kickback during wheel lock up for optimal tool and operator protectionElectronic current limiter prevents motor burnout due to overloadingSoft start feature gradually increases speed to eliminate start up shockConstant speed control maintains constant speed under heavy loadAnti-Restart feature prevents accidental start up of tool if switch is locked in the on positionLED Light indicates active power supply and activation of anti-restart featureLabyrinth construction features a complex series of channels to prevent penetration of dust and debris into the field and armature for maximum operational lifeMotor winding protection features "Zig-Zag" varnish on the armature and hardened powder on the field coils to act as an impenetrable barrier to dust and debrisRotatable gear housing can be positioned at every 90o for optimal positioningRemovable side handle can be mounted on left or right side of tooErgonomic soft rubber grip design for vibration absorption and comfortable operationIncludes: Side Handle (158237-4), Lock Nut Wrench 28 (782424-9), Toolless Wheel Cover(123145-8), 5" Depressed Center Wheel (1 Ea. A-95962-25), Inner Flange (224399-1), Lock Nut 5/8-45(224568-4)