Here is a bit about each of the items:

Tiger Tail -

Make your muscles happy! The Tiger Tail Rolling Muscle Massager is a foam covered, muscle-friendly solo massage tool that assists individuals with deep tissue massage, trigger point therapy and sports massage therapy. The Tiger Tail helps relieve sore, tight and cramping muscles by helping restore muscular balance. Great for the neck, shoulders, arms, upper/lower back, gluts, IT band, thighs, hamstrings, quads, calves and feet! Recommended and used by professional athletes, sports trainers, massage & physical therapists, chiropractors and doctors. Made in USA!

The Original Knobble II -

About the size of a standard doorknob, the Original Knobble II is made of durable polymer. The 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. The Knobble II has the added benefit of a soft band of non-latex, Santoprene around the base that allows for friction techniques.