Vibes Aerospaced 2 Piece Grinders are milled from 6061 aircraft-grade aluminum making it lightweight and durable. The grinder also has an anodized finish to prevent the metal from flaking and scratching. This Vibes grinder is precision engineered to give you a seamless grinding experience. Featuring optimized threading and a strong neodymium magnet lid that maintains an air tight seal. The grinder has 30 razor sharp diamond shaped teeth to easily shred dry herb.