12" Flower Pot Holder with Special screw mount brackets clasp to VERTICAL wood balusters or "spires" on decks, fences and porches. Fits 1" to 1-1/2" square balusters / spires. The brackets are made with specially formed 1/8" thick plate which provides "IRON CLAD" holding power - and importantly - are very easy to install with just a screw driver! Powder coated 7/16" square steel. Made in USA.