HiSmith Vac-U-LockThis sex machine adapter is a high quality, affordable sex tool. It can make the hard lock sex machine possible to use Vac u lock accessories. It is electronic polished for a super smooth surface, so you are not tied down to one particular size dildo. and you don't need to buy additional dildo to start the sex machine pleasure. you can take any Vac U Lock accessories you have, To lock it on you sex machine, then you can start a unbelievable sex