Science
Statistics after the product is released can be seen as a science if people are getting injured less by knives due to more being sharp than dull.
Technology
Finding statistic and materials that will perfect my product is how I used Technology
Engineering
Creating the product and actually building it is how engineering relates to this product
Arts
The original sketches show how art is represented in this product.
Math
Math is used t calculate all the parts and sizes and make sure everything fits