Keep your rail tips from pushing through track windows 
A must have for running 3" or 3.5" pitch tracks or when shortening your rails to accommodate anti-ratchet drivers
Looks great!
Can double as a limiter strap shaft for a single or double limiter strap setup
Can also be used as a standalone shaft on the very front of your rails
Removal of your rail caps and some rail material may be necessary for this install
2 Wheel model can be used as a cross shaft with bogie wheels to add strength and reduce hyfax wear.
Arctic Cat ProClimb and Yamaha Viper chassis can only use the 2 wheel for the front, 4 wheel will not clear FTA during suspension bottoming.

7075 Shafts
6061 T6 spacer shafts
Black hard coat anodized billet 6061 wheels