Measuring a bicycle chain's pitch can be used to identify chain wear and flag the need for a replacement chain and/or cogs and chainrings. Bicycle Chains: Length, Width, What's Best to Buy etc.
Daith piercing. A Daith piercing (pronounced DÃ¤TH) is an ear piercing that passes through the ear's innermost cartilage fold, the crus of the helix. In most areas this piercing is pronounced day-th which can be compared to the word faith, which is nonstandard. The standard pronunciation is doth like goth.
Industrial barbells are most commonly worn in what is known as a cage piercing--a series of inline piercings through the cartiledge of the ear allowing one to wear a long industrial barbell (usually at a slight downward angle) through the front and back of the ear simultaneously.