AMGO Double-Joint Bionic Arm KitsAMGO Double Joint Bionic Arm Kits For Two Post Lifts The new AMGO Double Joint Bionic Arm Kits for two post lifts enhance the lift's features by offering a minimum pad height of 2 3 4" and 180 free swing, facilitating easy arm access and positioning for various vehicles, including electric vehicles and low clearance vehicles. Sold Individually. Kits Required For AMGO Two Post Lift Models BP 9 Requires (2) #20908A and (2) #20908B BP 9X Requires (2)