The Groove grinder by Aerospaced is one of the most innovative advances in grinder cutting tech in quite some time. Instead of using the kind of teeth we expect to see in grinders these days, it has a series of smooth grooves in the lid and a set of shapened cutting edges on the holes in the lower section. As you spin the grinder it slices your herbs incredibly finely without crushing it all together. The result is a perfect consistancy for herbal vaporizers and smoking alike. Made of high-grade CNC aluminum it is super tough. Available in a variety of colors so please select from the drop-down menu.