What is a movable number ring ?
A movable number ring is a common feature on a bristle dart board. The numbers around the circumference of the target area are mounted on a wire that can be turned. This is a handy feature to have, because over time players tend to wear out certain segments of the bristle dart board that are commonly used in certain darts games. The movable ring allows you to rotate the mounting of the dart board on the wall, yet keeping the numbers in the same places top to bottom and left to right.