How has no one thought of this before?
"A carefully developed understanding of the core problem combined with an open-minded approach to solution can achieve the most wonderful designs."
Why built-in collars? I'm willing to bet you've been using clips or collars at least once in your life. And it might not always lead to a bad experience, but hear me out. Over time, you might experience having a hard time putting them on and taking them off, finding them broken or bent, or not finding them at all. And that's before having them slide away mid-set.
"That sounds unreliable and wasteful" you might say. And we'd agree! So we just went ahead and built collars into the bar. It's not there just to look cool or to be easy to use, it's also there to rid you of all the small annoyances related to using external collars, so you can focus on what's important - having a great workout experience!