The die hard range of cables are some of the best signal cables money can buy, and are manufactured by one of the worlds leading players in cables - proel, made from premium materials such as oxygen free high conductivity (ofhc) copper - the purist copper available! Due to the structure of the ofhc copper, the cables can set to a directional nature, meaning they have a specified direction and thus even further enhanced performance. The connections are as strong as they come, and the cable itself is magnetically shielded giving the ultimate protection to complement the purist sound quality. Proel have faith in the die hard range, so much so that they issue a lifetime guarantee against any manufacturing fault. Buy a die hard cable, and you need never replace it!