this gag is great fun. It looks amazing. Definitely very unique and fun to play with. The gag has a small plastic tube on the inside. Around 3cm long. This is where the wearer would rest there teeth, the gag is locked on with a buckle strap at the rear. It also has the option to pass a padlock through it to ensure it cannot be removed. Obviously plug stopper is the most noticeable point in the gag. This makes for some great scenes during play. Whether that is feeding the sub all forms of liquid or placing the plug in and stopping them from being able to drink anything. This gag is excellent for watersports play