WORKPRO Utility Knife Blades, 100-Pack Utility Blades Replacement with Dispenser, SK5 Carbon Steel, Red. These come in very handy on any jobsite. I mounted it to the side of my old tool box to be sure I always have them when I need them. Being able to dispence 1 at a time or 5 at a time is a great option too. #Rankboosterreview #Viralix #Workpro #Jack