These drivers are known to us as T3 Drivers. These drivers have involute points that go outward and inward with anti-ratchet points in the middle of the driver. The involute points drive off the rubber track bumps found on either side of each track window. These drivers will work with Skidoo tracks which DO NOT have four rows of rubber bumps in between the track windows, Skidoo tracks only have two rows inside of the track windows and two rows outside of the track windows. You may need to trim your rails and install an antistab kit Antistab Kit.  2022+ Matryx Series 8/9 (3.5 pitch, 2.75 paddle) do not have 4 rows of bumps in between the rails. This driver will work with the 2022+ Matryx Series 8 Track. If you are unsure which track/driveshaft you have please refer to this link. Track/Driveshaft Doc
If you changing tracks on a Matryx that came stock with a 3'' Paddle/3'' Pitch or a 2.6'' Paddle/2.86'' Pitch to a 3.50'' Pitch Skidoo/Lynx/Polaris Series 8 track you will need the 2022/23 7 Spline Aluminum Short Shaft drivers, 6 Teeth, 3.50 Pitch. These drivers are made longer to extend inwards and grip more of the splines on the drive shaft.
These drivers are sold individually, you will need two per snowmobile.
If you have a Polaris and your driveshaft is prior to the Aluminum Hex or Steel Splined shaft please refer to our Steel Hex Shaft Drivers. Steel Hex Shaft