- Adaptive Design: The longboard hand sanding file block features a rotating handle and a rear groove, allowing for easy adjustments to both flat and curved surfaces. This design maintains its angular shape during sanding, ensuring consistent profiles throughout the process. - High-Quality Material: Crafted from lightweight polyurethane foam, this multifunctional manual sanding tool is durable and elastic, minimizing breakage. Its ergonomic design promotes comfort and ease of use, making it compatible with PSA sandpaper and PSA roll sandpaper. - Excellent Performance: Our adjustable hand grinding board is lightweight yet robust, offering superior control and smooth sanding results. With a size of 7cm x 40cm (2.76 inches x 15.75 inches), it is designed to accommodate 70mm mesh sandpaper or two pieces of 70mm x 198mm sandpaper, maximizing efficiency. - Widely Applicable: This hand grinding board easily adjusts to concave and convex shapes, providing the ideal angle for various sanding tasks. It's perfect for woodworking, car waxing, wall sanding, rust removal, paint removal, and other DIY projects. Key Benefits: - Achieve precise sanding on both flat and curved surfaces. - Durable material ensures longevity and consistent performance. - Ergonomic design enhances user comfort and control. - Versatile tool suitable for multiple applications in various projects.