Help prevent wear and tear on your beading wires and cords. These 14Kt yellow gold filled wire guards work like French wire to protect cord where it curves through clasps and other findings. Hole size is .79mm (0.031"). Give your jewelry a professional finishing touch with wire guards: simply thread your cord through the hole at one base of the guard, up along the channel, and down through the other hole. Gently thread the loop assembly into your clasp jump ring, pull out the slack in the cord, anchor with a matching crimp, (and if desired) finish with a crimp cover.