Two Personalized-built stainless steel grips were being used in a microtensile check rig (UniVert, CellScale, Waterloo, ON, copyright) to connect the wire specimens. Stainless steel tubes were milled to suit the actuator and base factors on the UniVert device and aligned rigidly in the exact same axis with the actuator. https://www.ortix.co.uk/wires/