This item is actually two tools in one. It holds heat-shrink PVC neck capsules into place while shrinking them onto the wine bottle. It also allows you to pull those stubborn caps off your wine concentrate bags. It speeds up the bottling process by allowing you to hold the neck capsule on the wine bottle when using boiling water to shrink them. Safer and faster, without a lot of fumbling around. Makes for smoother sailing and a smoother finish on your bottle neck capsules. Takes all the prying, pulling and popping out of opening your bag of wine concentrate. Slide the de-capping tool over the cap and lift. It's that easy. Easy to use.