The cryogenic freezer uses liquid nitrogen technology, which is distinct from traditional surface treatment methods. Unlike other techniques, cryogenic treatment causes structural changes that penetrate to the core of the workpiece, providing comprehensive treatment of components. This means that treated parts can be repeatedly used without altering their performance, significantly extending their lifespan. When applied to metal parts, liquid nitrogen cryogenic technology does not change the dimensions of the components; instead, it reduces internal stresses caused by quenching, thereby enhancing dimensional stability.