Butterfly Knife

This is a butterfly knife that uses 2x 608 bearings, the blade has 2 gaps to put them 

(608 bearings have an outer diameter of 22mm, they're pretty easy to get, got mine by disassembling useless hand-spinners)

and to assemble everything, use m8 nuts and bolts, length may vary if you dcide to put washers or not

f3d file included so you can remix it, or just check for dimensions or anything

stay careful, it's not a real knife, have fun playing with it