Vac U Lock Double Up Plug Frost Double your pleasure with the Vac-U-Lock Frosted Double Up Plug! Perfect for couples, both sides of this double-ended plug are compatible with all of Vac-U-Lock Attachments, making it the most versatile double ended toy on the market. Create a traditional double ended dong, vary the sizes and features, or experiment with different textures and shapes the possibilities are endless! You can even use it for solo play, using the other end as a handle!