The Knuckle Up accessory is compatible with the entire selection of Vac-U-Lock attachments, with its one size fits all knuckle rings sitting below a standard Vac-U-Lock plug.
You will not believe how versatile this toy is! It is perfect for both masturbation and playing with a partner! What are you waiting for? Experience endless pleasurable possibilities with the most user friendly sex toy system in the world.
Features: compatible with any Vac-U-Lock Attachment.
One size fits all knuckle ring grip.
Phthalate-free, body-safe material.
Comfortable during use.
Dimensions 5.8 inches long by 4.5 inches wide by .8 inch deep.
Vac-U-Lock Knuckle Up Black from Doc Johnson Novelties The Great American Toy Company.
· For Easy Handheld Use of Vac-U-Lock Attachments
· Distinctive Brass Knuckles Shape
· Powerful Non-Slip Grip
· Use with Any Vac-U-Lock Compatible Attachment