These are great little bits of hardware, and the fasteners they came with are nice. They're hex fasteners, you'll need a fancy screwdriver, but they're great for really torquing stuff down.
The nuts have a sleeve that don't quite fit in the holes in the hardware, if I had one quibble that would be it. You might want to ream the holes on the hardware out a scosche if you want the nuts to sit flush. I didn't care enough to bother.

Ordered a number of Maker Pipe items and they functioned exactly as expected.

Excellent products.

I'm building a storage rack above the workbench in a small shop space of my garage. The tall support legs will sit on the floor, so the structure will not need to be attached to the bench, as such attachments would get in my way. As additional design ideas occurred to me, I placed a second order for Maker Pipe fittings. This is an ingeniously flexible system for economically creating many kinds of structures. Just a comment, not a criticism: At a few stages of construction, I've needed a helper, i.e. four hands, to get things aligned properly while tightening clamp screws.

Everything works as described.