Vac-u-loc is a system that allows you to attach your dildo to various accessories, including strap-ons, machines, and suction cups. To use the system, simply lubricate the hole at the base of your dildo and slide it onto the accessory. The vac-u-loc system uses suction to keep your dildo firmly in place, so you can enjoy hands-free play. This is our collection of dildos that can be ordered with vac-u-loc compatibility. While customizing your dildo at checkout simply select the option to include vac-u-loc compatibility.