- ADAPTIVE DESIGN: The longboard hand sanding file block features a rotating handle and a rear groove for easy adjustment to both flat and curved surfaces. This design allows you to maintain a consistent angle throughout the sanding process, ensuring precise results every time. - HIGH-QUALITY MATERIAL: Crafted from lightweight polyurethane foam, this multifunction manual sanding tool is durable, elastic, and resistant to breakage. Its ergonomic design provides a comfortable grip, enhancing usability. Compatible with PSA Sandpaper and PSA Roll Sandpaper for efficient surface treatment. - EXCELLENT PERFORMANCE: Our adjustable hand grinding board is designed for optimal control and smooth sanding results. It covers a larger contact area, improving performance. Dimensions: 7cm x 40cm (2.76 inches x 15.75 inches). Requires 70mm mesh sand or two pieces of 70mm x 198mm sandpaper. - WIDELY APPLICABLE: The back groove design allows for easy adjustments to concave and convex shapes, giving you the ideal angle for various sanding tasks. This versatile tool is perfect for woodworking polishing, car waxing, wall sanding, rust removal, paint removal, and other DIY projects. Experience efficient sanding with a tool that adapts to your needs and improves your workflow.