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.
An industrial, or scaffold, piercing is made up of two holes that are connected by a single piece of jewelry (usually a long barbell). An industrial piercing is commonly made through the cartilage on the upper ear, with one hole close to the head and the other further down on the outer rim. Two or more industrials on one ear is sometimes referred to as an ear cage.
A daith piercing is pierced through the fold of cartilage closest to the ear canal. Whether or not you can have a daith piercing will depend on your anatomy - there must be enough room for a bar or ring. Daith piercings are cartilage piercings so they may take a while to heal. Choose from these best-selling daith piercing items or click to see the full range.