I'd be doing exactly what padi advised-following his link.
But if what you say is accurate, this is beyond just being an item not as described case, it sounds more like a deliberate attempt to scam you.
When you say 'scrap metal', what exactly do you mean though? Do you mean they were tools but very poorly made tools that didn't work properly, or do you literally mean scrap metal as in random bits of broken metal that were not tools but just put in the package to give it weight?
If the latter is the case, then as well as an item not as described claim, I would also contact ebay with photos and report a problem with the listing, that the seller was a scammer. That's a whole new level of problem in my book.
Apart from those things, I can't think of much else you can do. Getting your money back is first priority.
You can of course leave feedback but you'll have to be careful how you word it. You can now attach photos to your feedback. I don't think they are showing online as yet but it is a feature that seems to be coming soon. Be very careful how you word your neg. I recently had cause to leave a neg and gave a factual account of what I received but then added a sentence to say I did not believe the item was brand new as advertised & my feedback was removed. I was pretty incensed to tell the truth. Ebay won't tell you why feedback is removed either. So my advice with feedback is just describe your item as very poor quality or unuseable. Whatever you do, don't mention an ebay claim (not that I did in my feedback either) as that apparently is a no-no.
