Seems made from bone....It's a PVC pipe. Actually many connections that I've made during shopping on the warehouse (Just mounted it on the pipes sector....people staring at me like I'm some sort of freak) Great stuff about putting it toghether is that the glue "melts" the PVC, and after you assemble the prts, it becomes solid...one unique piece. Of course I've made a little "sculpture" on the parts, to be more "bone" like. This slingshot is very, very strong, and shall receice "king kong" bands! I'm Thinking of making another one with a tutorial video...anybody interested? Would be good for the beginners, since it its very easy !