Without knowing anything about the brand of lights, etc., it's hard to say. Unless you're dealing with vintage Mac computers (which required a special tool to open), I'm guessing it's something not totally custom. If you provide a picture of where the tool fits, maybe someone can point you towards a replacement or work-around.

I just recently entered the digital camera age and have yet to do much online with it yet. I'll see if I can snap a picture and post it ~ wish me luck!

The pendants are Kichler I believe. We had several lights we installed with the glass shades that used this particular tool to screw a ring under the shade to keep it tight. Then the light bulb screws in underneath. Not sure if this helps or makes much sense.

~Amy

If the digital photo thing doesn't work, and they are Kichler, you might find something on Kichler's website, or by email.