Abstract: Device for adjusting quarter turn fasteners including a stabilizing member configured to engage each rivet in linear alignment therewith to press against rivets of a DZUS® quarter turn fastener. A second component includes a spring adjustment member for engagement with the spring to move the spring either toward or away from the support surface. An operator element is provided in operational association with the adjustment member to allow manual adjustment of the spring by movement of the adjustment member in coordination with operation of the stabilizing member.