1 Rustic Re-Purposed/Salvaged Solid Wood/Lumber Shabby Chic Floating Shelf. Note to buyer: Each shelf may vary in the grain and style due to using real natural re-purposed salvaged solid wood or lumber each piece is unique. Shelves displayed in picture are an example of the 36" set. Mounting system: 2 pictures show the mounting system for these shelves which is very simple but very sturdy on your wall. The shelves come apart into two pieces. The back thinner/skinny piece slides off the larger piece of the shelf from the dowel rods between them. There are pre-drilled screw holes on the thinner piece that you screw directly into the wood with provided 2 1/2" dry wall screws. Then just slide the larger piece of shelf back onto the dowel rods and your done!