Few herb grinders combine precision and style as effectively as the Aerospaced Groove Grinder. This 75mm 4 piece grinder features kief catching capabilities as well as an innovative coaxial turbine design to make short work of flower. A magnetic lid prevents annoying spills while keeping this high quality metal grinder in order. You don’t even have to use your own penny since this grinder provides its own triangular piece to help you knock kief free. The matte black finish further reinforces the sexy yet mature image of this premium herb grinder. Presented in a discrete threaded pouch, the Aerospaced Groove Grinder takes grinding herb to a superior level.