Profile: Pressure Positive Co. markets massage tools, self-care tools and other educational products. Our Knobble II is an all-wood massage tool, which is prefered by therapists and self care enthusiasts. Its base is held in the palm of the hand, and the smoothly rounded tip is used to apply pressure to trigger points in soft tissue. It has the added benefit of a soft band of non-latex, santoprene around the base that allows for friction techniques. Bodyworkers often use them to save wear and tear on their hands when applying deep, prolonged pressure to knots or strands of contracted muscle. Our Backnobber ® II is a deep muscle therapy device made of fiberglass reinforced nylon & is used to apply deep pressure to trigger points in the muscles of the neck, shoulders, upper and lower back.