I have a foredom hammer piece with the points that you describe and have used them to roll bezels. Maybe it’s me, but even with a lot of modification to the shape, they do more damage to the metal and sometimes the stone that I am setting than they are worth. Currently I secure the piece in thermo plastic holding it loosely in a small machine vise. Once the plastic is set, I tighten the vise. I then use brass rod pushers with the ends forged to a shape that fits the curve of the bezel and carefully push the bezel tapping the other end of the pusher with a light hammer. You can carefully work your way around rolling the bezel until the stone is set. There is still damage to be cleaned up with a small file, pumice or abrasive wheel or graver, but for me, a lot less than if I used the hammer piece. I usually do some of the cleanup just prior to the final round of pushing. My bezels are up to 1.5mm thick. I just use a hand burnisher for thin bezels. I do use the hammer tool and different points to add texture to my work and to move prongs. Good luck…Rob