NEW REPAIRED STL HAS BEEN UPLOADED

A holder a bit different then the others...
Feels comfy, easy to handle in action (while running, skiing,skating, diving, skydiving etc.)
Please don't punch someone with it. (I tested it for you, it does what a brass knuckles does, perfectly)
Some countries, its illegal to carry or have brass knuckles, so know your region's laws.
For the bolts, nuts and holder design, this guy has it.
http://www.thingiverse.com/thing:163883/#instructions

Check my other design
GoPro Frame for Backpac Or Touchscreen (Hero3/3+)
http://www.thingiverse.com/thing:888729