Piano wire stingers are an excellent way to circumvent the problems with lateral stiffness associated with conventional stingers. Essentially the piano wire has no lateral stiffness to speak of. The piano wire is pretensioned with a load that is greater than the alternating load to be applied; a preload of 3 to 4 times the range is considered reasonable. The piano wire is fed through the core of the through-hole shaker armature; it is critical to have a modal shaker that is designed to accommodate this arrangement. A simple preload can be applied with weights or an elastic tie-down strap. With the weight applied, the collet is used to clamp the tensioned piano wire. As long as the applied load during shaker excitation is less that the preload, then the piano wire is an excellent way to transmit force and conduct a modal test, eliminating the effects of lateral stiffness in conventional stingers.