A tool designed to crack open the shells of nuts like walnuts and pecans. Functionality: It operates by leveraging a squeezing mechanism, typically using a lever, to apply pressure to the nut until its shell cracks. Design: The one in the image features a functional design with red handles for grip and a metallic body to house and crack the nut. Purpose: Nutcrackers offer a safe and efficient way to open nuts compared to methods like using a hammer or attempting to crack them by hand. Types: While the image shows a manual type, electric nutcrackers also exist for larger quantities or easier operation.