The WIZMO Massager is designed for massaging small muscle groups. Simply roll the WIZMO back and forth over the chosen muscle group at a slow, steady rate as you search for tight and tender areas of the muscle. When you locate an area of tenderness, you can direct your massage efforts on that muscle group. Consult with your medical practitioner for treatment of any medical condition before initiating any therapeutic massage or exercise program. The WIZMO Massager is manufactured by the Thera Cane Co. and has a lifetime guarantee.