4 types of chassis The hand sanding block has a brushed chassis and four mounting styles for flexible use: concave, small arc, hook-and-loop fasteners, and quick-change sandpaper. These options allow easy changes and versatile mounting for different tasks. Adjustable air inlet switch This dust extraction sanding block includes an adjustable air intake switch with rotary control, enabling effortless adjustment of suction during grinding and helping to maintain a cleaner work area. Comfortable handle The handle provides a larger grip area for a comfortable hold and supports easy attachment of longboard sandpaper. Multifunctional use This hand sander offers precise control for sanding flat surfaces, tight corners, contours, and other hard-to-reach areas, with effective dust extraction. Applications - Finishing flat tabletops and panels with a smooth, even surface. - Reaching tight corners and contours in furniture, cabinetry, and trim. - Smoothing curved or irregular shapes on mouldings and other hard-to-access areas.