Cali Crusher Homegrown 2 Piece Grinders are a new high-end brand of grinders, made in the USA. These grinders are based out of San Diego,California. They come in one size, 2.35” wide by 1” tall. Each grinder is manufactured from 6061-T6 aerospace grade aluminum. They are sturdy and ready to take on the heaviest of grinds. The latest in patented technology was used to design the teeth and threading system used in this grinder. The teeth have a new patented dual-action, radial cut teeth. They create optimal shredding power when faced against large loads of herbs. Cali Crusher Homegrown Grinders have many other desirable features. They use Neodymium rare earth magnets for a super seal closure. Be ensured, your dry herbs will always stay fresh with this strong hold. They are available in a wide range of vibrant matte colors.