Hold It Mate Planter Box Holder Kit, 36" L The best solution for placing planter boxes anywhere on your deck or balcony's railing Connects snug to aluminum, wood, wrought iron, pvc Install Hold It Mate up high, or down low on your railing, or block a view with 2,Quality universal fit product that will not harm your railing and will provide a very sturdy holder Powder coated steal and stainless steel hardware, Hold It Mate is patent pending Fits vertical spindles from 1/2" to 1 1/2" depth