Ocean Fenders Clip-On Can Holder Ideal for holding and keeping cool cans, small bottles and glasses Can be used as an object holder for mobile phones, eyeglasses, portable vhf and GPS etc Made of flexible Integral PU skin foam technology, light- weight, it can be clipped on all guardrails, pulpit and stanchion, making it an essential accessory on board Easy to install. No tools Required: clips on Instantly to any guardrail between 0.86" -1" diameter. No metal, Springs or moving parts ensures no Rusting or breaking. Can be easily taken on and off Floats if Dropped to the Sea, so you will not lose it