iStō® is for holding the duck plug onto your Magsafe adapter so that you never loss it again! When using the wall plug cord, simply slide the duck plug off the magsafe adapter and onto the iStō® for safe and secure stō-ing while not in use. 3M VHB 4930 tape recommended for adhering the iStō® to the magsafe adapter. The design of the iStō® is sleek and compact and stows the duck plug in a way that allows the magsafe adapter to lay flat without causing excessive bulging when placed in a laptop bag. For the remainder of 2014, if you purchase an iStō®, I will send you, free of charge, the 3M VHB 4930 tape, cut into the necessary shape so you can properly adhere the iStō® to your magsafe adapter.