These bigger shaped kegel balls help you to train your pelvic floor muscles and enhance sexual pleasure. You wear this balls inside your vagina with the pull-out cord out. You can start to exercise by wearing the balls for a few minutes each day and increase the duration of the training as you get stronger in the intimate muscles. Small metal balls inside provides the vibrations when you move. Very pleasant for your love life and very helpful during and after pregnancy. Discrete, safe and easy.