Easy stick on every smooth face(Miorrow,Ceramics,Plastic part,Phone Case) Easy to install: simply stick the card holder slot onto the back of your cell phone or mobile case High quality strong adhesive on back of your cell phone,but no sticky residue when removed Suitable to fit your ID Card,Credit Card,Pouch Card,Discount Card,etc. Replace your wallet with a phone card holder when you are ready to go Pare down: save space in your pocket or bag and carry all your essentials on the back of your smartphone