Hard dies are used for metal and rigid plastic parts. Low-cost steel rule dies can be used for custom shapes in flexible substrates and thin gauge metals or foils.

A die is a specialized tool used in manufacturing industries to cut or shape material using a press. Dies are generally customized to the item they are used to create. Dies are typically made by tool and die makers and put into production after mounting into a press. Dies are commonly used for cutting unusual shapes and/or rounded corners.