The "Head Assembly" can be used on all animal control poles except the Economy Animal Control Poles ". The Head Assembly " is the assembly that holds your Cable Assembly " to the pole and allows the coated loop end of the animal control pole to swivel. The "Head Assembly " consists of; a swivel collar, inner head, threaded spring attachment tube, and a C-Clip, to hold the assembly in place with the ball shank of the "Cable Assembly ".