Dry Grinding Hand Push Board The hand push board is designed for dry grinding and is suitable for car putty, ash, and body tasks. It provides stable control during operation to help achieve a smooth, consistent finish. Rectangular Vacuum Sandpaper Comes with a rectangular sandpaper sheet that works with dust extraction. This design allows flexible adjustment on curved, flat, and concave surfaces for even material removal and cleaner work. Ergonomic Design The handle and back groove design enable convenient and comfortable operation, reducing fatigue during extended use. Thorough Grinding for HardtoReach Areas Its curved profile allows thorough grinding of concave parts, dead corners, and feather edges, promoting a uniform base for subsequent finishing. Use Scenarios Auto body : presand and blend putty and filler on panels before priming. Curved surface finishing: smooth bumper corners and rounded edges without gouging. Edge blending: prepare featheredged areas for seamless paint transition.