I made all these myself. The one on the right was my first one. I made it so that I could fit it to doorhandles while being at home. Both sides have a polishing compound on them.
The Two small ones are my most recent ones and I've made those to have in the woods. The idea behind the paracord is that you can snag it on branches etc. and hold the other end. One is darker and another is lighter, the difference being that I oiled one up with sewing machine oil to see what it would do. Seems it just makes it slicker to sharpen. I mean, the blade just glides effortlessly and it get's sharp! It only has a polishing compound on one side, again leaving the smooth side untouched (except for oil). The other hone only has a polishing compound on one side and is untouched by oils. They work really well.
The two large ones are my beasts. I had some stones cut out for me as a base, so that the hones wouldn't move around on my desk. One is untouched and the other has a polishing compound on it. Both of them have the smooth side up, which I like better than the rough side. I also applied copious amounts of silicone glue on the bottom of the stones, so now they won't budge one bit!
I also have one that I bought online. It's small simple one which is mounted onto a board and has leather on both sides. Works great too.