I put up both versions since the bolas horn version requires you to make the chain (you’d need pliers, jump rings, clasps, and chain) or you could thread some cord around both sides. The hoop version is easier since you just need a finished chain (here’s a link to some online or a craft store like Michael’s will have some, the loop is big enough to fit 3mm chain).

Hoop Top Shapeways Post: http://shpws.me/Ol9S

Bolas Horns Shapeways Post: http://shpws.me/Ol9R