As cool as butterfly knives are (with all the tricks you can do), sadly, they are illegal in most places. Solution? Switch the knife for a comb! Now you can whip
...さらに表示 out your comb in style, maybe even pull off a few tricks before giving your hair that combing it needs. Best of all, it's printable from your 3d printer!
Video: http://youtu.be/DvH46YAMY3A
Enjoy! :D
Warning: Design is in beta. Will hopefully get around to improving the design for better assembly and function.
