It is the series 3rd to stimulate the glans.
Straight from Japan, the Black Lock KR Cock Massager is a vibrator that targets the head of the penis. Utilizing a glans cover and two mini rotors, this unique vibrator pinpoints the most sensitive part of the penis: the glans on the underside of the head.
Black Lock KR Cock Massager

Once erect, the cover can be placed over the top of your shaft and activated via an adjustable control which unleashes powerful double waves of vibrations that circulate across your member. With the simplicity and ease of the Black Rock KR Massager's design, you can take self-pleasure to the next level.