Wide adjustment: adjustable from 17.7 to 24.8 inches to match a range of shelf widths in kitchens, bathrooms, dormitories, laundry rooms, and other spaces. Helps prevent size mismatch and fits different setups precisely. Carbon steel construction: made from strength carbon steel with an antirust coating. Widened support arms increase stability when extended, providing reliable performance in humid environments. Tool installation: size is adjusted with thumb screws and secured by a hooktype design. No extra tools required, enabling quick setup for beginners in just a few minutes. Simple and versatile design: metal texture is clean and understated, blending naturally with various decor styles without disrupting the space's aesthetics. Use scenarios: In the kitchen, place under a cabinet shelf to create extra storage for towels, utensils, or dishcloths. In the bathroom, use for towels, washcloths, or toiletries within easy reach. In a dorm room or closet, expand organized storage for small items, bags, or accessories in tight spaces.