Made of Aluminum | KeyStack Expands To Hold A Number Of Keys While Maintaining A Sleek Profile | Fold Keys Out To Use, Fold Keys In For Storage | Included Accessories Tab Accommodates Larger Keys, Fobs And Accessories. Approximate Size: 3 1/2″ W x 1/2″ H x 2/5″ D, Imprint Area: 1.9374″ W x .2769″ H