Abstract
When human hand grasping an object, nail will support and restrain the deformation of finger pulp. Object is able to be grasped firmly due to the adaptation of finger pulp to the shape of grasped object. So, the nail is considered to be playing an important role in every motion of the fingertip. But the study case regarding the nail structure and it's mechanical properties are very rare. We used guitar string and applied to ways of doing experiment, such as pressing and flipping on the string.
