This new design uses a solid copper rod - bent, stamped, and drilled to be your next keychain addition. We hope this helps you safely interact with public spaces when it is necessary. Solid copper - 99.9% pure Keychain Compatible - comes with a standard keyring Open doors- use the hook to grab door handles to pull them open. Won't work for round door handles. Keypad entry- great for keypads at the gas pump, elevators, payment terminals, etc Antimicrobial- copper is oligodynamic, meaning it has natural antimicrobial properties*. HOWEVER, this is NOT a replacement for proper sanitary procedures like handwashing and disinfecting. Please follow CDC guidelines to protect yourself and others. Designed by Woody Maringer. Due to our process, the size of hooks may vary from ones shown in the photos.