Everything Yoga Pilates Toning Ring With Stabilizing Grips Pilates Toning Rings are used in many Pilates exercises that work to firm and tone arm, leg, buttocks, abdominal, and back muscles. The unique grips on this particular Pilates Ring are cushioned, allowing you to comfortably grip and hold the ring in place as you move. Also unlike other Pilates Rings the actual ring is covered in soft material and has no sharp or hard surfaces.