This is a grommet I recently tied around a steel ring. I've always wanted to tie a rope wreath, and this is essentially a "mini-prototype" tied with waste string from my last project. The Ashley Book of Knots has a few methods shown for tying grommets, but they are somewhat difficult to follow- I decided to attempt to draw my own version which is shown to the side (double click to enlarge). Tying in two colors makes it a little easier to see what you are doing. It is also important to keep in mind that due to the structure of the knot (which is very similar to a two bight turks head), the knot will be tighter on the inside of the ring compared to the outside of the ring and you need to plan accordingly. I have some rope on order, so keep an eye out for the full sized version.