Processes for preparing modified pigments are described. Each branch is provided with a pin engaged in an annular groove provided in the head of the instrument. The earmold can also include a removably attached module. The plurality of cutouts receive a corresponding plurality of teeth from the clutch member wherein the plurality of engaging members engage the teeth. The upper contact comprises a first contacting portion at one end thereof and a first mating end comprising two contacting sheets overlapped at an opposite end thereof, and a lower contact comprises a second contacting portion and a second mating end defining a channel, the channel providing a space to allow movement of the first mating end. At least one independent anchoring element is attached to one of the member ends of the strength member and has an opening provided therein.