These high quality fidget/stress toys are machined from 6061 aluminum right here in California at RPM Headquarters. Then finished with a matte black anodize job. Each spinner comes with a high quality full ceramic bearing already installed so it's ready for use right out of the package. Matte black bearing button also included.
*NOTE: Double spinners are a tad shaky when moved around while spinning. But holding them still while spinning gives you a very smooth spin. The shakiness is normal for any double armed spinner. It's not until you add a 3rd arm, like the triple F spinner, the shakiness goes away when moved around while spinning.