1.smoking herb grinders 2.Tobacco Grinder: zinc alloy grinders 3.looks beautiful Smoking products: these are zinc alloy grinders, metal grindersTobacco Grinder, Space Case grinder, aluminium grinder,One of the products in the photo is 3 piece zinc alloy grinder, It has one part in plastic and two parts in zinc alloy.Others have different shapes, fashion and popular. zinc alloy grinders