On Friday, December 17, 2010 4:45:02 PM UTC-8, All Points Fasteners, Inc wrote:
http://www.allpointsfasteners.com/He...ZipScrews.html

http://www.allpointsfasteners.com/Tek.html

The two different type of screws your are referring to are on the pages I attached. Hope this helps!

http://www.allpointsfasteners.com/