Could have I gotten double sided tape to do the job? Probably. However, these adhesive disks are just the correct thickness and match perfectly to the mount. It provides me with options in moving the mount around if needed to other vehicles or locations. The adhesive is also very strong put can be removed without it being left behind. I'm glad I ordered a replacement and then just in case, ordered several more. I do a lot of rental cars and it sure makes it nice.