Feature●Locks flywheel in place when removing harmonic balancer on 6.6L Duramax Engines with Allison automatic transmissions●Saves time by locking the flywheel at the transmission instead of having to remove the starter for water pump replacement●On 2500 and 3500 pickups, remove metal spring-loaded inspection plate on the bottom of the transmission●For more information check the main Lisle tool- 22100●Replacement part for Lisle tool- 22100Description Light Truck Flywheel Stop.