Paper Clip to set up simple photo background

##Simple background for macro photography.
With A4 paper, you can easily set up small photo background.
##New Design
The design is refined.
The clips have weight to prevent floating. And can be attached with other and easy to carry.
*The neckless in photos is the work by (c)Sui.
##log
[1 June 2018] No letter version added.
[31 August 2014] Rev.3 uploaded.
[29 May 2013] I uploaded new STL files by which you don't need to rotate or move models to print. Also, I changed file names to make it clear. (The design is not changed at all)
PaperClips Rev2.stl is pair of the left and right paper clips.
I've never imagined that such many people like this idea. Thank you!!