Metrokane Replacement Worm for Rabbit and Houdini Corkscrews,2 Spirals Corkscrew spiral, also called the worm, fits all Rabbit and Houdini corkscrews from Metrokane Replacement wine corkscrew is constructed of high-tensile steel with mini-bearings in head Triple-layer non-stick coating glides in and out of cork easily for a smoother cork extraction every time Simply unscrew the old worm and remove, slip the new corkscrew in place Worms need to be replaced after approximately 800 to 1,000 cork pulls; open lots of wine bottles with just one cork spiral