These aluminum round pads are great for any application where you need a rail or pole welded for support. These are great quality and fit perfectly on a 2x4 if you want to attach to a deck, dock or pier. They won't rust so it's save to use around salt water or any other harsh conditions. • High-quality mill finish, precision machined pads • Spiral Sanded • Center bleed holes vent air during welding • 4" Dia. • 1/4" screw • 1/4" thick • Made in USA Quantity: 1 Pad This is a Marine Fiberglass Direct exclusive product. *All International Orders may require additional shipping charges depending on location.