The Chopper is like a paper cutter for plastic. I use it to chop up little rectangles of styrene strip to create repetition (important in scratchbuilding) and to create surface detail, well at least I do. Haven’t seen anyone else use lots of little rectangles to create detail, but that’s just me.
Here’s a link to a description and picture:
http://www.ares-server.com/Ares/Ares.asp?MerchantID=RET01229&Action=Catalog&Type=Product&ID=82439
John