This is nice Sharp Stone 4 piece herb grinder that is simple and easy to use. It is made in the USA from stainless steel and includes a screen. The diameter on this grinder is 55mm.
Coming from using a safety pin and jar carb, this is a huge step up. It’s night and day. Makes me feel like a pro. Delivered in 4 days, no damage. I’m very pleased with this product. I’ll definitely order from this site again.