For heavy duty deer fencing installations, this in-line monofilament collar is an improvement and alternative to self-locking ties when attaching monofilament wire to in-line posts. The guide consists of a black-coated steel brace band, eye bolt, and two nuts. Place the cuff around the 1 5/8" post where your monofilament will run across, tighten it with the bolt and nuts, and thread your monofilament through the eye. This method will reinforce the monofilament line against tampering from animals and impact from falling branches. Also, it will ensure that your line stays straight and sag-free. These steel pieces are completely chew-proof, weather-resistant, and a permanent solution for attaching your monofilament.