The Neuro Ball is a 3-in-1 tool and one of the most versatile release tools on the market.  The Neuro Ball can be used as a ball or split into two domes, and provide both sensory stimulation and/or trigger point release. 
Featuring the Naboso texture on the surface, the Neuro Ball provides simultaneous release with sensory stimulation. 
Bonus, inside the Neuro Ball is a firm Micro Round for detail work and to get into the small muscles of the feet and hands.