The mounting platform works with any 1 in diameter shaft or pole and is ideal for mounting your bluebird or wren house, The stainless steel thumbscrew allows you to secure the platform to the pole, This way your mounted item will never pop off during harsh weather or high winds, Sturdy die-cast parts will hold up to the heaviest items, Measures H x W x L: 1, 9 x 4 x 5, 5 SKU: GC6744