Keller - POLARIS GENERAL 1000 BALL JOINTA Reimagined Ball Joint Keller ball joints were designed to address the shortcomings of standard ball joint design. Instead of using a snap ring, Kellers reimagined ball joint uses a threaded housing to make it virtually impossible to pull out. When you combine that with a hardened chromoly steel construction throughout, its easy to see why you need SuperATVs Polaris General 1000 Keller Ball Joints on your machine ASAP. Robust and Durable Todd Keller