The RHINOSHIELD Magnetic Ring can be installed on most phone cases with a hard / flat surface, including the RHINOSHIELD Clear, Mod NX, and SolidSuit protective phone cases. Do not apply it on matte silicone, matte glass, and other soft / textured materials such as leather, wood, brushed metal, etc. We do not recommend directly attaching it on the device. As the Magnetic Ring uses a strong one-time adhesive, we suggest to avoid sticking it on printed designs on your case.