The LeeLock Crab Cracker allows you to measure your Dungeness crabs to determine which ones are legal to keep, and then instantly crack them in half over the top of a five-gallon bucket to separate the two clusters from the shell and guts. Cleaning crabs with the crab cracker is quicker and cleaner and the clusters take up half as much space as whole crabs so you can cook twice as many in your kettle.The Crab Cracker has four different measurements to cover minimum sizes for Oregon, Washington, California, Alaska and Canada. Its made from solid aluminum.