Perfect for chasing fish with legal length requirements, the Clam Fish Trap Bump Board connects directly to any hard-sided surface, making it quick and easy to measure your catch. When you're on the ice, the Clam Bump Board can be used to check ice depth, as well. The durable aluminum construction has laser-etched measurement markings for easy reading. The Clam Fish Trap Bump Board comes with a plastic receiver sleeve for installation. Rugged aluminum construction Laser-etched measurement markings Perfect for quickly measuring your catch Plastic receiver sleeve for hassle-free installation