Of the multitude of tools that come with the Multi Master, in my opinion this is one that should be included. Razor sharp and extremely durable. I have cut garden hose, a 10 sheet thick owners manual (cut out the spanish/french portion, a leather belt I needed to trim (lost weight :-) and I cut a thick piece of cardboard to make a template and it handled all of these items like a hot knife through butter.  The size of the blade is just right.