Rotary Adapter Extension Kit for RA (Screw-up) Style Arms used on SPO/A10, and SL210 RA Series Lifts provides additional lifting height when vehicles require additional clearance and can also be used to level a vehicle on a lift. The kit includes four (4) 3-1/2” and four (4) 5” adapter extensions (FJ6171-1 and -2), as well as a mounting rack with hardware. Note: Do Not Stack Extensions. See FJ6197 For Full Frame Truck Adapters