The TummyToys clasp is so simple: you just slide it through the piercing and snap it shut. TummyToys are specifically made for belly and body piercing. Beware of cheap imitations which are really just earrings with a heavier post...
14K Solid Rose Gold Tummytoys Belly Sleeper Ring With Real Gems, 14 Ga
14K real white gold Tummytoys belly sleeper ring with real gems, 14 ga