Really easy to use! I didn't glue this chalcedony stone in since it was almost a perfect fit to the bezel. I didn't have a burnishing tool, so used the flat side of my nylon head pliers to rub with medium pressure, curving over the stone. Took a few passes around the stone, but it's now snug enough for the stone to rattle. Once I got the ring sized for comfort, I used pliers to push the 2 "prongs" down onto the band and to press the tail end of the adjustable band downward (so it wouldn't stick out). Surprisingly, the adjustment connection is comfortable against my finger. BIG WISH: that these wonderful rings can be made to fit many more sizes of cabs, especially smaller ones, perhaps with 4-6 longer prongs to curve over odd-shaped cabs.