The Original Index Knobber II by Pressure Positive is an ideal trigger point massage tool for clinic or home use. Molded in highly durable polymer it allows the user to apply deep sustained and precise pressure to trigger points and to sore stiff muscles. Hands-on massage and physical therapists frequently comment on how easy it is to use The Original Index Knobber II massage tool because it protects the hand and forearm against fatigue and overuse while allowing maximum control and sensitivity to the patient. No batteries needed. Dishwasher safe.