Unique Circular Barbells - Looking for unique circular barbells with skulls instead of balls, fun dangles, spikes, or even a slave doorknocker ring attached? You'll find all that and more among our selection of unique circular barbells! Each unique circular barbell is made of precision-machined, hand-polished and 100% guaranteed 316L surgical steel. These are top-quality, cool circular barbells that you're sure to enjoy for years to come! Wear them in ear piercings, nipple piercings, and other piercings as appropriate.