Thumb Screw Clamps (Butterfly Hose Clamps),when you don’t have any screwdriver or tools at hand, you can use Hose Clamps easily. The piece of plastic, which is like a butterfly’s wing, is added to the screw of the product. This piece of plastic can be used as a tool to screw and to adjust the Hose Clamps to make the product completely close to each other.