These space-saving devices consist of a pin that syncasts into a spring-loaded plate. The plate is pressure-mounted by positioning itself on the outside of the bracket and remaining in place. The pin has a threaded base to be screwed securely to the panel. Opening and closing is done by simple pulling and pressing. The thickness and material used for the plate ensure adequate dinsertion and extraction effort and produce excellent mechanical strength that prevents the fastener from falling and being lost.