A non-locking Slider switch ensures the grinder switches off automatically when the unit is released, Small girth allows user to maintain a comfortable grip; resulting in superior ergonomics, The low profile gear case allows access to confined areas, Independent box and spring brush holder design increases brush life, Fully leaded stator windings for increased motor durability, Pop off brushes protect the armature from damage at the end of brush life resulting in greater motor durability, Abrasion protected motor for increased durability, Top positioned spindle lock allows maximum depth of cut, 100% Ball bearing design increases efficiency and durability.