This product functions like a traditional boat stand top, but the plate that contacts the hull of a boat is rubber instead of plywood. The rubber hull protection means these tops are less likely to scratch gel coat. Like all our boat stands and tops, this product is entirely galvanized. Wing nuts are painted after galvanizing to help differentiate between different length tops. Utilizes stainless steel carriage bolts with nylon backing nuts. Rubber plate is 10″ X 10″.