This bookshelf was built for a customer who needed some heavy duty storage for sheet music and guitar books. The three legs are made with 3/8" x 3" steel flat stock, so they are extremely strong and heavy too - the bookshelf sits firmly on the ground. The shelf boards are reclaimed pine, sourced from a local barn tear-down. They have been sanded and finished with a clear polyurethane. The shelf is bolted together for easy disassembly.