Cessna C421 Trailing Link Gear Axle Pin.Forget dragging out a full set of wing jacks to do routine maintenance! The 30M C421TL P Axle Pin with Trailing Link Gear (for Cessna C421 aircraft) makes maintenance on tires, brakes, and wheel bearings simple and fast. You can do the work just about anywhere! Use the Axle Pin to raise the Trailing Link Gear to fix a flat or do regular preventative maintenance. The system is small and light enough to carry on board so you have all the tools you need.