AAA-5004 4" x .25" x 8' Masonite - Created by the high-pressure compression of fibrous materials, Masonite is engineered to be a extra-strong and durable wood. Masonite wood is used in projects where a light wood is needed. It can also be added as a top/bottom layer onto other woods, as it receives nails and screws well. Masonite is uniquely flexible, which allows it to be used for projects where straight hardwood is unsuitable.