Use Activator as a surface to firmly strike end of tuning fork to “activate” vibration. Activator is tapered (so the bottom is wider) for stability. Activating a tuning fork on the body is not recommended, as injury can occur.
The purpose of an Activator is to provide an optimal sustain when activating your tuning forks, with minimal noise intrusion from the strike. In Sound Healing the strike of the tuning fork should be as unobtrusive as possible. The rubber material was chosen carefully for its level of firmness, to provide an ideal surface when activating your tuning forks, both weighted and un-weighted.
If the material is too hard, the strike will produce an unpleasant noise and undue wear on the tuning fork, and your hand/wrist. Too soft, and the activation is weak and the sustain of the vibration will be less.