The Quad Lock MAG™ Universal Adaptor is compatible with Quad Lock MAG™ standard heads and Quad Lock® Original twist and lock mounts. Quad Lock MAG™ makes mounting your phone even faster, simply position your phone and the magnets do the rest. Specs: 3M™ VHB adhesive Slim profile (5.3mm thick) 60mm wide and 60mm tall Durable and tough composite construction Adheres to flat and slightly curved surfaces Compatible with Quad Lock® Original twist and lock Mounts Compatible with Quad Lock MAG™ Head The Quad Lock Universal Adaptor uses a 3M™ VHB 4952 Adhesive which will adhere to smooth, non-textured, non-porous surfaces such as: Plastics such as PC, ABS, PVC, Nylon, Acrylic Non-painted metals Un-coated glass The adhesive will not bond to the following substrates: Rubber, TPU, TPE Leather Silicone Hydrophobic coated glass (Also known as anti-fingerprint glass, which is found on the back of most modern smartphones) Soft touch coating or paint Low surface energy plastics such as Polypropylene (PP), Polyethylene (PE), Acetal, HDPE Wood