an official looking spin-off of the common butterfly knife to practice with. Keep it classy! Update: i have commonly noticed that after extended use, the blade tends to break..... use with caution, i will figure out a way to fix it as soon as i can. (hopefully) Final Update: use more infill for a stronger blade, the less you use, the flimsier it becomes. I like 85%, anything more than about 70 should be good. Print with caution.this is the final version of a copy i have already tested, except this one has been altered, i havent tested it yet, so tell me how it goes! print one blade and two handles, and combine them with #6-32 screws, i used 3/4 inch, but i think 1/2 inch would be better. you may need to run a drill bit through the wholes to widen them out, but just a little bit.