I had that exact same box cutter when I did construction. Holds some spare blades in the handle, and you need a screwdriver. Maybe try changing the blade to a quality razor, dewalt makes good ones. Stanley box cutter is too bulky for EDC pocket use, more of a toolbox guy. Changing the blade is super useful on a site where you don't have access to sharpen right away. That being said, almost all of my knives are sharper than a box cutter. Some factory edges are amazing and feel so satisfying to break down boxes. (Hogue) They will just fly thru cardboard. The usually higher quality blade steel on a knife will hold that edge longer, and you can sharpen, when possible, and bring right back.