Working principle of integrated self-locking metal card holder

the working principle of the integrated self-locking metal chuck is that the metal material is elastically deformed under the action of external force, and when the external force disappears, it returns to its original state, leaving a slight deformation. This slight deformation causes stress inside the metal material, causing a slight displacement on the surface of the material, and then the capillary particles on the surface of the metal material are engaged with each other, thus achieving the self-locking effect.