Features: 1. 360-degree Free Rotation: Ball-type swivel pulley allows smooth movement at any angle, providing quiet and flexible operation. Ideal for makeup storage, kitchen countertops, bedroom, bathroom, living room, and flower shelf organization. 2. Good Load-bearing Capacity: The roller stand is made of high-quality plastic material, offering durability, firmness, and resistance to wear. It supports heavy loads and enables easy movement without strain. 3. Effective and Labor-saving: Simply attach the universal wheels to the bottom of boxes to effortlessly move heavy containers. Perfect for cleaning and reorganizing, compatible with various types and sizes of storage and packing boxes. 4. Easy To Use: Attach the strong adhesive pad to the pulley, then fix the pulley to the bottom of the box. Allow 24 hours for full adhesion before use. Smooth-rolling wheels make moving heavy items convenient and hassle-free. 5. IDEAL GIFT: This compact furniture caster set makes a practical gift for family and friends. Suitable for home, office, kitchen, living room, and bedroom furniture. Makes moving furniture and storage boxes effortless. Notice: 1. Actual color may vary slightly from the image due to different monitor settings and lighting conditions. 2. Please allow 13 cm deviation due to manual measurement. Material: Steel + Plastic Size: As shown in picture Quantity: 4 pcs Includes: 1 Set Furniture Castor