4 piece grinder is made of aircraft aluminum that is lightweight yet strong. Smooth grinding action and super sharp teeth. Add tobacco, herbs or spices to the chamber and twist to grind. Hand roll your own cigarettes or keep in the kitchen to prepare fresh herbs and spices. Securely closes with magnetic flip top. Prevents spillage and waste of contents and keeps contents fresh when used for storage. Compact size - easy to store or take with you anywhere in pockets, handbags and more. Unique rainbow iridescent color! Watch in awe as the color changes in the light.