The prototype belongs to the processing and customization industry. Mainly used for verifying the development of new products. Handboards play a crucial role in product development. The main purpose is to discover the appearance defects of the product and avoid problems in the later batch production process. Plastic, soft rubber, and hardware materials can be processed in the hand board model industry. The commonly used materials for making metal hand board models include aluminum alloy, stainless steel, stainless steel, ABS, PC, etc.