the whole project costs (at most) $25 and is quite durable, so its not like your gona go and try to use it and its gona break, and most households already have these items anyways.
oh yes, and the disclaimer:
This project is not intended for use on yourself, your friends or any of those pesky neighborhood animals, no matter how tempting it might be :p I am not to be held legaly responsible for any injuries or damage caused to yourself or other, this is also includes any property damage that may result from the use of this item, remember this is a WEAPON, it is to be treated with respect and not to be swung around wildly or broght to school FOR ANY REASON, it should be used purely for asthetic reasons and i can not stress this enough DONT USE IT ON ANYTHING LIVING!!!!! so, with that out of the way, on to the fun stuff.
Step 1: Step 1. materials
1- length of chain, any kind will do but i suggest stainless steel chain since it wont rust and is very duribale, the size of the links is up to you but for portability the smaller the beter (though try to keep it from being less than 1/8 inch links, otherwise it tends to break)
2- paper clips, as many as you want. (optional)
3- a quarter or just a plain stainless steel washer. (note the washer saves ALOT of pain in the but work)
4- a nail, and a hammer (if you're useing a quarter, you dont need these if you're useing a washer)
5- 2 pairs of pliers, and kind will do as long as they can seperate the chain links.
6- 1 exacto knife handle (with the peace that locks the blade in, you will not need the blades though they could be incorporated for extra damage/looks)
7- a little bit of imagination will go a long way in this project if you plan on customising yours.