3D printed in silk gold PLA plastic
Actually twists to open just like the Key of Hamunaptra from the mummy movie
Comes with the both spring box and circle
 
Dimensions:
3”x3”x1.5”
When open, it’s 5.5” across
Light Weight: 3 ounces
Circle is 6 5/8" across and 5/16" thick
 
Pros: Twists open!
Cons: lightweight, 3d printers print in layers so lines are visible (zoom in on pics)