Aerospaced Groove Herb Grinder 4 Piece (2.5")Description Get your Groove on with the all new Groove by Aerospaced! This is the latest in innovative coaxial turbine technology! Through its proprietary design, the Groove requires minimal material perp and delivers a light, feathery end grind, naturally separating your unwanted material for optimal purity Aerospaced brand grinders are some of the best in the industry. Crafted from Aerospaced grade aluminum and anodized for a smooth finish, you