Get the deep tissue relief you would get through a massage therapist's hand with the Trigger Point MB1, MB5 or MBX Massage Balls. These portable balls will target the muscles that are causing you discomfort and tightness at home or on the road. Simply roll the massage ball over your pain points applying compression and traction as needed. The MB1 and MBX are 1 inch in diameter, the MBX being extra firm. The MB5 is designed to target larger muscle groups at 5 inches in diameter.