Let's face it, it'd be pretty hard to stuff up a CNC Aluminium grinder. The threads fit and the kief screen is good quality, what more do you want? Plus a bonus plastic scraper for the kief included.

Works, but the teeth are a little bit too spaced apart so the herb doesn’t get very finely ground or agitated, so as a result it doesn’t really generate much Keif in the catching compartment. But it wasn’t expensive and gets the job done.