The shaft of the Sackjack is lined with bumps and grooves that feel fantastic as you slurp and slide on it. The opening at the end means you can also use it for other purposes. And the best part is that Sackjack looks like it's packing your goods and milking your meat. The clear, frosted color lets you see your swollen pig while you train with this thick, creamy load. On the inside of the ball sling, there is a ribbed ring that grips your balls and keeps them in their new sack. Each nut has two openings for drainage during a hot and heavy water sports scene or the perfect size for contact points for a shocking game.