Hillman Plastic Shelf Support, Clear is designed to securely mount shelves into bookcases, entertainment centers, cabinets, and more. These shelf supports feature a 1/4" pin that fits into the standard 1/4" holes commonly found in bookcases and cabinets, providing a reliable and stable hold. Typically, four supports are used per shelf, with additional supports for deeper shelves to ensure optimal stability and safety. Made from clear plastic, these supports blend seamlessly with your furniture, ing both functionality and a discreet appearance. Model Number: