Space Case Grinders are manufactured with seamed edges. This process requires each unit to be individually machined from a single piece of aluminum, which creates an invisible seam that renders the turning movement as smooth as glass. The 4 piece design makes grinding, storage, and sifting easy and convenient. The new style Space Case grinder/sifters have the company’s trademark name and “Made in the USA” on the top of the grinder. Each Space Case comes with a precision machined triangle collector specifically designed to fit the edge perfectly.