Doc Johnson sex toys with Vac-U-Lock systems are extremely easy to use and can make your strap on experiences better. To use, simply plug the adaptor into the hole in the base of your Vac-U-Lock dildo and which will create a vacuum and hold the dildo securely turning your hand-held toy into a hands-free experience that you can both enjoy. To remove the dildo from the strap on, tilt the accessory side to side to break the vacuum and prevent damage from forcing it off.