well, the functionality is there. if you can use thin chain, such as the type used to hold up porch swings, one could make a retraction device based on spring friction much like a dog leash or measuring tape. the weighted spiked end serves as a counter to the retractor and the centrifugal force produced when swinging the chain keeps it out. once not in use, it rolls back up into itself. but feasibly, you may only get a few feet of chain to fit without losing its good looks. i doubt having spikes on the chain is possible, but retractable spikes on the head and the retractable stake shouldnt be too hard. make it all out of cast steel and old leather and THEN its a weapon. hahaha.