I used to use this for tbar rows, chest supported rows, etc. Unfortunately it has fallen out of my rotation of commonly used attachments, but it remains versatile and I will keep it for now.
Excellent build quality, but expensive. I use it for a back support for tricep pushdowns and for chest supported rows attached to an upright until I get a stability pad.
The og voltra third party rack attachment. Great build quality, shims are nice. Somewhat more expensive than other similar rack attachments now, but the only one that I have that does 1" and 5/8" at the same time, which comes in handy because I have mixed upright sizes.