Dust ejection system removes majority of debris from the air which passes over the motor, preventing abrasion and trackingAnti lock flange prevents flanges from permanently locking up and locking the disc onAbrasion protected motor for increased durabilityNew guard design allows guard fitment, adjustment or removal without the use of tools, for increased flexibilityAnti vibration side handle to improve user comfortFully leaded stator windings for increased motor durabilityPop off brushes protect the armature from damage at the end of brush life resulting in greater motor durabilityThe low profile gear case allows access in confined areasOne piece brush arm prevents brush hang up in extreme conditionsSide positioned spindle lock gives greater protection to button when using in confined spaces