Many people still have old darts with the 1/4 inch BSF threads and struggle to find a shaft that they like for them. These Add A Grams solve that problem by screwing into the barrel of the dart using a quarter inch BSF thread on one side and reducing it to a standard 2BB dart thread on the other thus working as a converting adaptor. You then simply screw in your choice of 2BB shaft.
We also stock three varieties of old fashioned 1/4 inch BSF thread shafts.