A punching die is a type of die used to cut out specific shapes from sheet materials at high speed and with high precision. It is used in combination with a press machine, where material is sandwiched between a punch and a die, and the desired shape is formed by shearing force. Compatible with a wide range of materials such as metals, paper, resins, and fabrics, it is indispensable for the mass production of various products, including gaskets for automotive parts, lead frames for electronic components, various packages, and stationery. There are various types, such as single-stage dies, progressive dies, and simple steel rule dies, and the optimal die is selected based on productivity, precision, and cost. This enables the efficient manufacturing of complex-shaped parts, contributing to improved product quality and cost competitiveness.