Unique design for spill control and item retention: raised molding prevents spills and keeps pens and other small items from rolling off; cup groove provides a convenient place for a cup. Easy to install and remove: knee rest uses hookandloop fasteners for quick disassembly and reassembly; no tools or tedious procedures required. Durable material and secure construction: made of ABS plastic steel and fixed by fasteners; installation and disassembly are straightforward. Adjustable positioning for comfort and stability: the fixed position can be moved back and forth to match the user's body shape; reduces slipping and assists in maintaining proper seated posture. Practical use scenarios: At a desk or couch during work or study to keep cups, pens, and small items organized and within reach. In bed or seated for meals or beverages, providing a stable surface without spills. In rehabilitation, clinic, or home use to support correct sitting posture while performing seated activities.