The adhesive doesn't always work like it should.  Sometimes it gets pulled off due to excessive pressure on the Edges, falls off on its own within a couple weeks of installation, or doesn't stick at all.  There is no way for us to test the adhesive quality of each piece before we install or ship them.  These adhesive strips are used to replace failed adhesive in the Edges.  Each kit comes with an installation sleeve, 4 adhesive strips, instructions, an alcohol wipe, and an adhesive primer wipe.

Remove the old adhesive using your fingernail or tweezers.  Clean out the inside of the Edge with rubbing alcohol on a Q-tip, then wipe it out with the dry side of the Q-tip.  Use tweezers to carefully remove the replacement adhesive from the paper strip and place it into the recessed area of the Edge.  Press on adhesive with your finger to stick it in place.  Now the Edge is ready to install onto your phone.