Larger sanding area with three blades. High efficiency in sanding concrete stair surfaces, no need to press hard, easy to sand. Removable brushes, 90 degree sanding corners, leaving no dead ends. External vacuum cleaner can be connected, no dust in the work. Different discs can be replaced to meet the sanding and polishing floor work. Connect the extension pole, work without bending, sanding more flat, high surface quality. High-efficiency 3-head Grinding System: The 3-head diamond grinder design greatly expands the grinding coverage, allowing faster and more even material removal. Ideal for large concrete floor areas, surface leveling, and polishing tasks Powerful 2800W Copper Motor: Equipped with a 2800W high-performance motor that delivers strong, stable power with excellent heat resistance.