Designed to securely house your AirTag. Made of strengthened carbon steel with stainless security bolts as hardware. Having your Apple Airtag discretely secured in our tamper resistant Blackbox will buy you that time you need to make a successful recovery in an event your bike gets stollen. Keep in mind that metal enclosure does weaken GPS signal / radiowaves when using a GPS STYLE TRACKER. It does work, but not as reliable as an APPLE AIRTAG. We recommend using an Apple AirTag with our blackbox.