Cut the 20 gauge wire in half. Put the two 20 gauge wires (base wires) in the clamp 4 ½ inches from the end of the wires. Determine the width of the bezel needed for your stone. Then, use the larger dowel to set the space between the two wires, on the side with the longer length of wire sticking out, by putting it between the wires so both wires are barley touching the dowel. Tighten the clamp down so the wires are held in place.