The Ronan Mult-Cut Rubber Cutter is a handy tool for every window cleaner. Easily trim your rubber to fit whichever size channel you are using. The Multi-Cut has a mechanical action of a blade coming down onto a flat anvil. This design combined with a razor sharp blade & an offset pivot point gives you incredible cutting ability for cutting thick & rigid materials that have density. Included with the tool are inch graduations that are etched into the blade to aid in notching or simple measuring as well as 3 extra blades stored in the handle for easy exchange. The Ronan Multi-Cut's molded ergo-grip handle is a comfortable fit for any size. Comes with a safety lock to assure the tool stays closed when not in use and the black oxide coating resists rust and corrosion.