One of the posts was speaking of pins in the carpet; I found my solution to this in the Sears tool dep't.
I bought stainless steel small parts bowls that have a very strong magnet in the bottom. The bottom is also rubberized so it doesn't slip.
I use these on my cutting tables, however, I would not suggest using them up next to your computerized equipment. Magnets can cause damage to computerized machines.
Joyce