In a set of coffin handles that includes 6 pieces of long handles and 2 pieces of T-bar handles, the long handles are typically used for the sides of the coffin, while the T-bar handles are often used for the head and feet of coffin. This arrangement allows for multiple points of contact for pallbearers or funeral personnel to lift and carry the casket comfortably.

The specific materials, finishes, and designs of the handles can vary depending on personal preferences, cultural customs, and the type of casket being used. It's important to consult with funeral professionals or suppliers to ensure the handles you choose are compatible with the casket you have or plan to acquire.