Flush setting princess cut diamonds in a flat band.

Setting square stones flush in a men's ring, I first drilled 3 round holes, squaring them off with a jewelers saw, cutting the holes smaller than the diamonds. In the second picture, you can see the graver I used to cut seats for the diamonds. I carefully fit the stones.  This process takes time to get a tight fit. After making sure they are snug, I rub the metal toward the stones with a pointed carbide tool  leaving a polished finished border. FINISHED!