Choosing the most appropriate tensile grips to effectively secure your samples is critical in getting accurate measurements of tensile properties such as tensile strength, peak load, elongation, tensile modulus, and yield.
Tensile testing grips include manual vise grips, pneumatic grips, wedge grips, hydraulic grips, rope and thread grips, webbing grips, pinching, and self-tightening grips.
The link below will walk you through the different tensile grips while showing how each grip is best suited to specific tensile test specimens.
http://www.admet.com/what-kind-of-tensile-grips-should-i-buy/