For any of you who have struggled from time to time installing the back half of the gearbox to the main case when changing gears this little item makes life a lot easier. It's a remote starter switch that you can use with your knee to bump the motor over to match the splines to make it a lot quicker and easier to secure that last bit when inserting the gear pack. This way you have both hands and you don't need to con your wife to hit the starter button to bump the motor over. Takes only a few minutes to create! Pretty self explanatory.