Solid Top KANNASTOR 1-1/2″ 4 piece grinder is ideal for grinding, sifting and storing your herbs. Featuring EasyChange screen technology which allows you to remove the screen with no tools. Unique sized drop through holes are easier to clear and make shredding herbs much more consistent. KANNASTOR grinders are made from the highest quality aluminum alloy with ultra strong magnetic closure. All KANNASTOR grinders come with a manufacturers lifetime warranty against manufacturer defects.