For 4KAAD Poles. If you unscrew your basket or ferrules on 4KAAD poles and see a metal pin inside, these are the ferrules you want. Change-IT basket system with strong Tungsten carbide metal tip with metal pin inside for the connection. Won't work with other brands or older 4KAAD poles. 

Won't work on 2025 4KAAD poles that use a rubber tube.