Twisted half cube

A super simple two equal and symmetrical pieces puzzle. You have to screw one into the other since they are what remains from a cube when an helix swept through it.

I did it with onshaphe https://cad.onshape.com/documents/ddc8cd6d77f624b674a11f96/w/299f438ab6ad5e302cb043ed/e/76a80a6045748c75c74f82fa?renderMode=0&uiState=65b7a82525144467f7e159a2