Dust protection hood for dustless working; Rotating part of the dust protection hood for easy grinding in corners; High adjustable grinding disc for better sealing of the rubber seal; Robust bevel gear pair and gear housing for longer life time; Rotating handling (3 settings) for better ergonomic and balance; Tacho constant electronics with overload protection; High grinding power for faster surface preparation; Automatic restart protection (Protects against automatic restart after power failure); Soft start electronics; auto-stop brushes; Spindle lock for easier disc change