The OH-IO Block O Charm Buckeye Bead/Pendant Ohio State University The chain or cord goes through the center of the Block O so that it lays with the outside edge showing. On one side is the OH and as it spins around while wearing, it will rotate between the OH side and the IO side. It is an interesting new twist on the traditional Block O! Solid Stainless Steel OH on one side and IO on the other Fits popular bracelets like Pandora, Chamilia, Trollbeads and Biagi. Officially Licensed Product by The Ohio State University. The Buckeye Bead, your Columbus Buckeye Jewelry Connection!