This mini-size Biotensor is based on a wooden grip handle in red color and a brass ring. The mini-size MT Bio-Tensor device was designed by Iris Bat - Shlomo, an expert therapist on the Master Tapping technique. The significant improvement in this Bio-Tensor is in the stainless steel spring at the edge of the rod that allows better control of the device movement and prevents muscular fatigue in maintaining the stabilization of the device.