One80 R2 Interchange Resilience Steel Tip Darts - 23gmIntroducing Revolution II, the R2 evolution combines all the advantages of the Revolution, with a new practical and easy method of changing the points at will. This happens with the new innovative R2 system, which provides the same excellent precise balance and aerodynamics of its predecessor, locking the head and fixing the point at the same time. With One80's point switching adaptors, you can easily switch the Reflex points in different diameters as