Quad Lock® Cases feature a secure locking mechanism compatible with all twist, lock mounts, impact-resistant edge to edge cover, and protective lining. Protective / Impact Resistant: With a tough, polycarbonate core and impact-absorbing TPU edge-to-edge outer shell, you can be confident that your Pixel will be protected every day. Sleek Design: The slim profile and soft-touch material make it perfect for everyday use. Quad Lock MAG™ Cases are thinner and flatter with a customizable MAG Ring. Quad Lock MAG™: Quad Lock MAG™ Cases are compatible with all Quad Lock MAG™ and Quad Lock® twist, lock mounts (sold separately). Quad Lock MAG™ makes mounting your phone even faster, simply position your phone and the magnets do the rest. Both Quad Lock® Cases are compatible with wireless charging. Quad Lock MAG™ only available for selected Pixel phones.