This device is made with heat resistant silicon for the Macbook power cord. It prevents the cord from fraying. How does it do that? It secures itself around the block of the power cord and supplies it with the necessary support through a stress relief attached to it that protects the very spot that is notorious for fraying and keeps it from fraying.
The Fray Fix Works easily with ALL the connection heads for the Magsafe power cords. Including the Magsafe 2 connector head.
*Power cord not included