Raising the Fencing
Pull the field fence up tight against the metal fence post. Center the fencing so that the bottom of it sits an inch above the ground, which will ensure the fencing doesn't touch the soil. Ground contact increases the likelihood of rust and fence deterioration.
Placing the Wire Clip
Wrap the V-shaped part of the clip around the backside of the post. The V-shaped part should cradle the post. The clip has two ends. One end has a loop in it and the other has a hook. Both of these ends must be above the wire you're trying to attach to the post.
Tightening the Wire Clip
Hook the hook-end of the clip up over the wire. Grip the loop-end of the clip with the jaws of the fencing pliers. Bend the loop end down, around and back up over the top of the wire. You can accomplish this by twisting with the pliers. As the loop wraps around the wire, it will pull the hook side of the clip tight. The V-shaped part of the clip will tighten the fencing to the post.
Repeating the Process
Move up about 6 inches from the bottom clip, and attach an second clip. Repeat this process until the field fence has been attached to the fence post every 6 inches. Use the jaws of the fencing pliers to crimp the hook-end of the clip around the fencing wire.