Pulsar Metal Storage and4-PieceGrinder Now, this we like very much. Pulsar made a 4-piece grinder that also serves as a storage box, all in one piece. And it looks like a stunning tower of strength. Of course, this piece can be assembled as you wish, and it's completely modular so you can even pocket it when the situation calls for it. It's made from airplane-grade aluminum and equipped with a magnetic top lid, a sifting screen, a pollen chamber, a storage chamber, and a scraping tool.