This model is a really cool knife that can actually cut humans and other organic tissues really well. The knife is basically an aligner for a piece of paper that does the cutting. It prints in two parts, simply slide the blade into it's slot and glue it in. To add the paper(cardstock works best)simply insert a full piece of paper into the notch and use scissor to shape it like a blade. Dipping the paper in resin or glue will make it much stronger but it may reduce the cutting capabilities. I was inspired heavily by the term, "Death by a thousand cuts." Since this is an ancient samurai torture technique they would be using full swords or knives to make slight incisions on the victim. Since this is really hard to do with a full sword but easy to do with paper, I simply designed the knife to align the paper to make torturing an easy experience. :)