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.
Industrial piercings consist of two piercings along the outer ear rim linked by one long bar. They can be placed either straight across the ear or at an angle. In different parts of the world the term industrial piercing can refer to both vertically placed piercings and horizontal piercings.ndustrial piercings consist of two piercings along the outer ear rim linked by one long bar. They can be placed either straight across the ear or at an angle. In different parts of the world the term industrial piercing can refer to both vertically placed piercings and horizontal piercings.