The ACTIVATOR IV was the first ACTIVATOR developed by Dr. Fuhr to incorporate a manual series of 4 settings. These settings allow for thorough treatment to patients: axis, atlas, pubic bones, lower cervical, lower thoracic, pelvis, lower lumbar and sensitive areas. The ACTIVATOR IV’s light weight, pre-loaded springs are perfect for use on tender areas of the body and are also ideal for treating patients with smaller frames. It was the first in the Activator series which didn’t need grip alternatives. The Activator IV can also be ordered as an EZ- Grip, as well!The Activator IV EZ Grip is specially designed for Practitioners with smaller hands. This EZ grip solution will give the doctor the leverage they need without straining their hands.