Placement: the 3M adhesive used on the interface adheres to many non-porous, flat surfaces such as plastic, glass, metal and painted surfaces. Placement: the 3M adhesive used on the interface adheres to many non-porous, flat surfaces such as plastic, gl, metal and painted surfaces. Use: attach the smartphone or other devices to bicycles, motorcycles, cars, golf carts, etc. in just one second. This adhesive pad makes it possible. Installation: peel off the film of the adhesive pad and press it on the back of your case. Make sure you have the most central positioning possible to achieve optimal results.