Shifter stick with handle removed.  The set screws grip the white nylon plunger inside the stick. The plunger has to be positioned as shown and the set screws must be in the slots of the stick to keep the assembly from rotating.

Adapter installed. Knob then screws on to this and it is totally hidden once screwed on. Shims are included that go on top of the adapter so you can get the logo straight when installed.

American made right here in CT.  Billet aluminum knob and adapter.  

VERY easy to install, no tricks to set up correct and retains all stock shifter functions.  Just push down on the knob to get out of Park.  Actually easier to use than the stock shifter.  To install, remove your stock shifter handle, removes by pulling out a c clip at the base of the handle.  You will notice a white plastic stem sticking out of the chrome shifter stalk.  There are two slots in the chrome stalk, this is where the two allen screws are tightened locking the adapter to the white plastic stem.  No need to gorilla tighten the allen screws just snug them up.  Then the shifter knob itself screws on to the adapter.   I have been running this setup in my own GN for quite a while now. 

These are for use with the stock shifter ONLY