Contractor Supply Warehouse 20 in. L x 2.5 in. W x 3/8 in. H - Free Hanging Shelf Bracket - 4 Pack

Durable American Steel – Made from high-quality 3/8-inch or 1/4-inch American steel for strong support in heavy-duty applications like shelves, mantels, and desks. Invisible Floating Design – Mounts to 2x4 studs behind walls for a seamless, hardware-free look.