Abstract: A coupling device for engaging members having rings, hooks, bars and the like is disclosed. The coupling device is constructed in a manner which reduces the number of moving parts needed to engage and disengage members having rings, hooks or bars over the prior art, thereby simplifying the manufacturing process. In particular, means are provided for disengaging the rings, hooks or bars from the coupling device which means comprises only a spring, two retractable jaws and a plunger having an end of predetermined extent which the ring, hook or bar on the member may bear against, thereby compressing the spring and retracting the jaws.