It is a pair of 49 inch long aluminum molds used to make polyurethane rail protectors that snap on a railing. Mostly they make wear parts and last longer than steel. They give me .005 tolerance on the entire form for the entire length. The reason I have stayed open for over 35 years is I make the form tools to do these kinds of molds. They can be very tedious to make but also fun when they are done and shipped to the production plant.