Great hardboard used for the ping pong table or skateboard ramp you have or have been looking for! It was used more widely back in the 20’s,30’s nd 40’s for doors, roofing, walls and even siding. As time when on it lost it’s popularity. They call it masonite due to using the Mason method of blasting wooden chips into long fibers with steam then forming them into boards. Please wear knee pads and a helmut when skateboarding.