This pack of four wood to steel post adapters are able to fit 2 x 4 (nominal size) wood boards, (true size 1 1/2" x 3 1/2") These wood fence to steel post adapters are 6" wide and fit 1 5/8" outer diameter metal posts Made from high-quality and durable galvanized steel to prevent rusting and be long-lasting These wood to steel adapters includes the setting screws to make sure the posts do not move when in place Easy to install Whether you are building a greenhouse or a fence, this set of four wood to steel adapters will be just what you need for your outdoor project. Made from durable and sturdy galvanized steel these adapters will not rust and are sure to last for the long haul. Created to fit 1 5/8" (1 5/8" OD ) metal posts as well as 2" x 4" wood boards and are each 6" long. These wood to steel post adapters each include setting screws so your fence or structure will be securely in place.