Double bull's-eye device

摘要

A double bull's-eye device incorporated within a circular rib formed on a dart frame includes a base having a top end and a bottom end engagable with the circular rib, an outer bull's-eye sleeved from the top end on the base, and an inner bull's-eye passing from the top end through the base to be mounted on the base. Such double bull's-eye device can be incorporated to the dart frame easily.