Rotation stop for chisel function. Rotatable brush plate for optimum forward & reverse operations. Lock-on button for continuous drilling. Soft grip for comfortable and fatigue free use. Infinitely variable speed control for easy adjustment of speed. Overload clutch - for better protection of users and tool in case of jamming drill bit. Auxiliary handle with depth gauge and soft grip for comfortable handling. Quick-Change Chuck for easy switching between impact drilling in concrete and non- impact drilling in wood and metal.