Vedo Bolt Cock Ring Set Just Black. Bolt non-vibrating c-rings are sleek and sexy and make you stay rock hard. Made from silky smooth silicone, this 3 pack of cock rings: small, medium and large, are super stretchy and made to fit any girth. Each c-ring comes with a convenient pull tab for easy removal from your shaft or nut sack, scrotum for some. Just poke your pecker and/or drop your sack though a couple of these bolts and you are good to go.