Ecclesiastical ring the new pope. The pope's ring is not to be confused with the papal seal, which is what the pope uses to seal documents. The Fisherman's Ring is no longer used to seal anything. Except Pope Benedict XVI, who chose to wear his at all times, the ring had not been seen being publicly worn by a pope since the papacy of Pope Pius XII, who refrained from wearing it once his election ceremonies had been concluded. A collection of rings belonging to the popes of the past is exhibited in a glass case in a room within the papal
X-ring chain is in contact with the chain plates) when under pressure. Therefore the friction in X-ring chain does not increase much when pressure is applied by the chain plates. X-ring chain The X-ring chain is a specialized type of sealed roller chain used to transfer mechanical power. Like the O-ring chain it is used in high performance motorcycles. It uses X-ring seal to keep lubricant(usually grease) in place. It has higher performance (in terms of durability, lifetime, and power loss) than non-O-ring chain as it has less friction than O-ring chain which also increases reliability. It can last twice as long