- Four chassis options for precise sanding on curved and flat surfaces: concave, small arc, flat, and large arc. This allows the block to match different geometries and maintain even contact with the work surface. The hook and loop fastener system enables quick and easy sandpaper changes. - Adjustable dust extraction power: an adjustable air intake switch with rotary control lets you tailor suction strength to the task, helping to improve dust removal and maintain a cleaner work area during sanding. - Ergonomic grip design: the handle features a larger contact area to provide a comfortable, secure grip, reducing hand fatigue during extended use and enabling more controlled sanding. - Multifunctional performance: suitable for both flat surfaces and hard-to-reach areas, offering consistent control when working in tight corners, contours, and other challenging spots. - Practical use scenarios: - Finishing curved furniture components such as chair legs or railings where multiple chassis shapes provide precise contour matching. - Smoothing door frames, window casings, and other vertical or horizontal surfaces with tight corners and edges. - Refinishing tabletops or cabinetry with a combination of flat surfaces and surrounding contours to achieve an even, uniform finish.