These grips are specifically made high tension, flat plate, metal dumbell samples. Samples require drilled clearance holes in either end to accept clamping disks. Diameter hole of 7.94mm(0.31 in.)in diameter maximum sample width is 35mm(1.38 in.)maximum sample thickness 0f 6mm (0.23 in.)
Specificationpackaging includes upper and lower grips.
Applications include straining a metal dumbell sample by tensile force, generally to fracture.