Tricky Nut ;) (Lefty Inside Tread)

I liked this thing as a trinket but where the bolt screws together I wanted as a lefty thread so as the nut is being twisted or the bolt heads were played with it was less likely to be figured out. It is not the exact model, as it was easy enough to make in Fusion 360 myself. If anyone wants the F3D file let me know! Credit to original maker's post! I dub this the "Tricky Nut"