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® MountsSecure Mounting: The 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 lockedSlim Profile: At just 4.5mm thick, the Quad Lock® Universal Adaptor fits seamlessly onto the back of smartphones and casesPlease Note: Use of the Universal Adaptor may interfere with Wireless ChargingIncluded:1 x Quad Lock® Universal AdapterTechnical 3M VHB adhesiveSlim profile (only 4.5mm thick)Just 56mm wide and 66mm tallDurable and tough composite constructionSurface Guidelines:The Quad Lock® Universal Adaptor uses a 3M VHB 4952 Ahdesive which will adhere to smooth, non-textured, non-porous surfaces such as:Plastics such as PC, ABS, PVC, Nylon, AcrylicNon-painted metalsUncoated GlassThe adhesive will not bond to the following substrates:Rubber, TPU, TPELeatherSiliconeHydrophobic coated glass (Also known as anti-fingerprint glass, which is found on the back of most modern smartphones)Soft touch coating or paintLow surface energy plastics such as Polypropylene (PP), Polyethylene (PE), Acetal, HDPEWoodWe highly recommend using a case with the Universal Adaptor if your phone has a glass back