Homegrown 4pc Grinder by Cali CrusherCali Crusher presents the revolutionary American made Homegrown Grinder. This is the next level in grinder technology, packed with features unseen on any other grinder before. Most notable is the original 4 Way Quicklock feature, eliminating cross threading incidents and jammed grinders. The screen is removable and upgradeable with the use of a small hex key*. Homegrown Grinders are made of top shelf Aerospace Medical Grade aluminum with