The front pin is known as the 'King' and is painted with a white, one and a half inch wide vertical stripe. The two pins to either side are known as the 'Quarter pins' and are marked with either a triangle or the numbers 1 and 2, in order to identify them. Traditionally the 'King' is the heaviest pin, with the 'Quarters' being heavier than the rest of the pins but not heavier than the 'King'. Directly behind the 'King' is the middle pin which is known as the 'Birdie', as the other pins form a 'cage' around it. The back pin sits directly behind the 'Birdie', the 'Back quarters' directly behind the 'Quarter' pins, and the 'Wingers' on the outside of the diamond. The 'Birdie', 'Back Quarters', 'Back Pin' and 'Wingers' are non-specific pins and are not marked so any of the six unmarked pins can be placed on any of the six plates.