Radius arm bushing with caster adjustment.

[jarfly]

So on rock auto ordering bushings and what not for my daily's front end rebulid. And seen they have a radius arm bushing with cashter adjustment built in,
Was just wondering if any on has any experience with these?
https://www.rockauto.com/catalog/moreinfo.php?pk=389890&cc=1138104&jnid=526&jpid=13 Link for lazy people...

 

[adsm08]

Interesting. I've never seen that before.