Gripples add strength and security to the fence. The 12 ga. gripples are used to connect the two ends of monofilament wire along the fence. Insert the end of the monofilament line into either side of the gripple. The 12 gauge gripple fence part will automatically grab and secure the monofilament wire ends without releasing them. Use the gripple fence piece tightening tool to pull and tighten the monofilament wire.