Robert Borsuk wrote: I have one that is from an HP tester. The pins which appear to be in radial rows are spring loaded and when you put this in the tester, it is with the pins down to connect to probes on the tester. The electronics in the center are actually on the back side of a carrier board which would have a holder for a device under test, or at least mine does. The pins are reusable, but the testers are falling out of use and so these come on the market for gold scrap. Also when a company such as an ASIC maker shuts down an office usually they are in possession of these test fixtures and they just toss them. They do have a lot of gold if you scrap them, and are pretty much useless unless you want to recover the pin probes. jim