If you have a deck/patio in full sun but want no more heavy annoying umbrella base taking up precious space, try Deckman Patio Umbrella Holder! Why choose Deckman Patio Umbrella Holder? Deckman patio umbrella holder is special designed to attached to patio deck railing, saves a lot of space than the traditional base, disattaches and moves easliy as the sun moves. The holder is designed to match with a various range of deck baluster size, it can be attached to Deck Railings Post (Max 6X6") or balusters (Width from 2" to 8", Min thickness 3/8") by adjusting the long bolts and eyebolts. The clamp is designed to be tighten from 4 directions, this ensures the high stability of the umbrella, hold in place steady even in windy weather. We chose premium material to make the bracket extremely durable and anti-rusty, using 304 stainless steel with black finishing. No worries about damaging the railing surface, we prepared some tapes to attach with it, which prevents your railing from getting scuffed up.