The Quad Lock® Universal Adaptor can be directly adhered to smartphones, cases, iPads / tablets and most flat metal or plastic surface and is compatible with all Quad Lock® Mounts. SECURE MOUNTINGThe Patented Dual-Stage Lock makes it quick & easy to attach / detach your device, whilst giving you the peace of mind to know your device is securely locked.SLIM PROFILEAt just 5mm thick, the Quad Lock® Universal Adaptor fits seamlessly onto the back of smartphones and cases. 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 ADHESIVE WILL NOT BOND TORubber, 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. - We recommend using a case with the Universal Adaptor if your phone has a glass back.- Please ensure the substrate is thoroughly cleaned and dry before applying the Flexible Adhesive Base. The 3M™ VHB™ is a single use adhesive and is not reusable. Use the online chat for doubts or questions!