Which types of samples are the rod-like grips indicated for?

These grips have been designed to apply tension loads on the samples, as well as the sheet-like grips. However, these grips have been conceived to be used with samples which present a medium or high mechanical resistance and whose geometry is not plane.

Scaffolds or samples which may be used with these grips are ligaments or tendons, which have a cylindrical-shaped section, or other tissues with thick sections.