These connection sleeves are used to terminate a run of 12 gauge monofilament wire at the corner or end of our deer fencing systems. The connections sleeves come in packs of 25. Thread the the 12 ga. steel wire through one side of the connection sleeve. Wrap the monofilament line around the corner or end post, and thread the end of the monofilament line through the remaining hole of the connection sleeve. Use our sleeve crimping tool to crimp down on the connection sleeve to secure the 12 gauge wire in place.