Compatible with all Original twist and lock mounts, our Quad Lock® Universal Adaptors boast a secure locking mechanism and can easily attach to phones, cases, and flat metal/plastic surfaces. Measuring only 5mm and 5.3mm in thickness, the Adaptors fit securely on any smartphone. For added convenience, the Quad Lock MAG™ Universal Adaptor is compatible with Quad Lock MAG™ standard heads and the Original twist/lock mounts, making mounting your device a breeze.