Ingenious magnetic corner clamps hold pieces firmly at a 90 degree angle! Great for structure kits!
I got mine on ebay. What we did was several of us bought them together and got a great discount on shipping. The other advantage is that between us, we have a bunch of clamps for use! The guy is trying to get people in Turkey interested in model railroading and he manufactures all these items himself. With several emails, I found him to be both friendly and trustworthy. My buddies and I purchased several of his items.
If you look at all his listing on ebay or on his website, you will see all kinds of cool stuff!
Here is a current (033111) link to an ebay listing for these magnetic clamps. There is a demo video on the ebay listing also. Hope this helps...........Geoffrey