These drivers will fit the 2008-2018 Skidoo hydroformed shaft. These drivers will not work with Ski Doo tracks. If you have a Ski Doo track select the drivers for the T3/G4. You will need an installation tool to install these drivers. 9 tooth 3" pitch drivers are $30 more each.
You can purchase the installation tool here
*Note that this tool will open in a new tab/window.