While browsing eBay, I come across someone selling these:

http://www.phantomgrip.com/

Here are some other linkson the web about them:

http://www.nissanperformancemag.com/april02/phantomgrip.shtml
http://www.rivergate5speed.com/phantom_grip-commets.html
http://www.neoncars.com/limited_slip.htm

<img src="http://www.neoncars.com/images/phantom_grip/pg_installed_neon4in.gif" alt=" - " />

<img src="http://www.neoncars.com/images/phantom_grip/pg_for%20_neon.gif" alt=" - " />

So I am looking at the thing, and I have to ask: How the %$#@ does the thing work? <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />

Materials look similar to a Lockright, one article mentions springs and pins - again similar to a lockright...

If someone could explain it to me, I would love to know...