The following are the 10 best metal herb grinders:
1. Cali Crusher Homegrown 4-Part Grinder
2. SLX Aluminum Non-Stick Herb Grinder
3. VIBES 4-Part Anodized Metal Grinder
4. Aerospaced Anodized Aluminum Grinders by Higher Standards
5. Hakuna Supply 4-Piece Zinc Grinder
7. ZAM 4 Piece Stainless Steel Grinder