Systems: left and right knobs for precise sandpaper tensioning, ensuring even pressure distribution across the entire 220x60mm sanding surfaces. Aluminum Body: Constructed with precisions milled aluminum alloy featuring anodized oxidation , this 1.1kg tool rust resistance, structural stability, and durability for intensive woodworking and crafting applications. Oversized Sanding Platform: The 220×60mm work surfaces accommodates various grit sandpapers, with simple installation via end clamp screws ideal for beginners and professional alike to achieve efficient materials smoothing and finishing. Nonslip Operations Base: Equipped with rubber foot pad and mounting holes for secure placement on workbenches or tables, ensuring stable positioning during detailed edges rounding, surfaces leveling, or precisions polishing tasks. Manual Control: Enables exact pressure and angles for delicate operations including woodcraft refinement, model finishing, leather edges , and sharpening perfect for hand controlled detail work without power tool limitations.