WImberly Plamp II is a very useful clamp. It can hold a anti glare shade when photographing small objects. Also has many other practical functions in photography. I also use it to hold my Prometheus flashlight.
Wimberly Plamp II sells for about $43.00 on Amazon
Useing a 12 inch reflector I was able to photograph the Wimberly Plamp II with a Wimberly Plamp!
Refelctor is about $8.oo The Plamp is designed to hold this reflector. I used the Foldio light box as well.