Gold Plated Contacts - because gold is the best electrical conductor and does not oxidize. Connectors are internally shielded, grounded to the connector where convention dictates. Unused wires are also grounded. Thumbscrews - where convention dictates, makes installation easier. Some connectors can't be accessed by screwdriver.
Unfastened cables tend to fall apart at critical times.
Lifetime Warranty - Good manufacturers commit to excellent cable design. All rights reserved All trademarks are property of their respective holders at the time of this publication.