I've not used a plastic kief grinder before, but I own 2 or 3 plastic grinders of all different brands.
Never have I had a problem with the acrylic "grinder teeth" falling out, The one way they would "fall out" is if you were to smash it with a fucking hammer, not by grinding herb.
It's the grinders with pins as the teeth you have to watch out for.
WeedyBoyWonder Reviewed by WeedyBoyWonder on . Is this grinder any good??? What's up guys? I've been wanting to buy a grinder for a while, and now that I've learned more about kief, I've decided to get one. I found this collection on a site, for a good price but it looks plastic and I want to make sure that plastic ones are of atleast decent quality. Has a kief collector, which is my main purpose for wanting a grinder.. Rating: 5