1. Fitment: Fit for 5th Wheel, Travel Trailer and Motorhome, replacement for entry doors and replacement for Challenger Door Series 450, 805, 950, 975, and3. Easier to Control Door: Entry door friction hinges allow you to keep the door in the exact position you need, making it easier to open and close the door.4. Smooth Operation: After installing this door hinge, the RV entrance door will operate more smoothly than ever before, increasing strength and durability.5. High Performance: The hinges have been tested to withstand gusts up to 25 miles per hour, preventing damage to the doors and RV sidewalls and windows.6. Upgrading RV Door: Friction hinges are a simple way to upgrade, without the need to install gas struts or constantly replace door latches that are easy to damage the RV.