The Raging Hard Ons Vac-U-Lock Dildo from Doc Johnson is designed to fit their range of compatible Strap On Harness kits from the Vac-U-Lock range. Simply detach your existing dong and this Raging Hard Ons Vac-U-Lock Dildo is attached by sliding it onto the Vac-U-Lock plug attached to the harness, quick and simple. This perticluar attachment Dildo is soft to the touch and heavily veined for improved intensity during use. It has also been made using Sil-A-Gel formula by Doc Johnson, making it anti bacterial, non toxic, latex and cadmium free.