Y8880297 Square Bar Adapter for Ywb200 and Ywb201

It does what it is supposed to do. There are no instructions that come with it. You have to slide out the rubber strip to expose the bolts. "Slide" is a relative term, it takes some effort to use just your fingers. On the one I couldn't push out, I used needlenose pliers which did leave a slight mark in the rubber. After loosening the bolt you can slide over your bar. There wasn't a torque spec, so I tightened to what I considered appropriate.The good news is that the system has enough play to let you get the bike rack on without a lot of adjustments. I eyeballed everything and despite not being perfectly lined up, I was able to use the rack and it is as secure as any other Yakima bike rack I have used.