3D printed expandable structure pendant

designed by me and 3D printed on Shapeways, on a resin-based SLA ¦:¬)
This kind of product can only be produced by 3D printing, it's preassembled ready for use in one step. With powder-based SLS machines you can have it printed in precious metals if you want ¦B¬D

This is the link to the Shapeways product where you can chose a material and color
https://www.shapeways.com/product/XJ9MGBPSF/expandable-pentagonal-pendant-keychain?optionId=56120141
and this is where you can download the model STL and Print It Yourself, enjoy :)
https://www.thingiverse.com/thing:693893