The Pedro's Vise Whip is simply a better solution for holding your cassette during removal. This innovative tool was developed by Pedro's in close collaboration with legendary frame builder and cycling technical author Lennard Zinn. The Vise Whip is beautifully simple to use, adjusts to fit 10-23 tooth gears on all multi-gear cassettes including 12-speed, and locks in place during use. Once you try it, you'll never go back to a chain whip again. Backed by Pedro's lifetime warranty.