Keller - POLARIS General XP1000 BALL JOINTThe Best Two Piece Ball Joints OEM ball joints use a snap ring to hold them into the A arm, which gives them a simple point of failure. Our Polaris General XP 1000 Keller Ball Joints are designed to fix that. Kellers original two piece design replaced the snap ring with a threaded chromoly housing. By assembling the ball joint around the A arm, you can use big lifts and tires without worrying about your ball joints pulling out of your arms. Durability