These silky smooth coated balls fit snugly in place, providing subtle, yet incredibly sensual vibrations as they come in contact with each other when worn during regular daily activities or during intercourse. When inserted into the vagina, the vibrating effect of the balls movement will provide irresistible stimulation and builds your pelvic floor and wall muscles, increases your grip on your partner, and heightens your arousal! Start with one and work your way up to both. This set also features a sturdy looped retrieval cord for easy and safe removal!