This umbrella hook made of high quality ABS plastic material- compact, sturdy, lightweight, high strength and durable Easy installation can be easily installed to beach umbrella without other tools; fits for any poles in diameter below 38mm/1.5 inches Lock screw for micro adjusting screw clockwise, easy and convenient to install To keep everything up off the ground at the beach or your backyard patio umbrella 4 pawls hooks for hanging towels, digital cameras, beach bags, sunglasses, Camera, Phone and other small items