The hot stone massage kit includes 4 placement stones and 2 working stones, ideal for common massage areas. The stones heat up quickly and retain heat well, providing healing and relaxing relief. Benefits include improved circulation, tension release, healing of strains and aches, relaxation of the body, and stress relief. The well-polished stones fit comfortably in the hand, glide smoothly over the skin, and provide a satisfying experience. Note that slight variations in size, color, and texture are natural.