Feature 1. Easy pushing the button
Existing cord lock is unstable for pushing the button. Because the button area is small and the pushing force runs away from right way. But TAB cord lock series has large good-grip surface where you can push easily.
Feature 2. One action to release
TAB cord lock series has large good-grip surface of the button.
Therefore you can gripe cord lock and push the button at the same time. For releasing you have to do one action, just gripe.