My rotary cutter is one of my most important quilting tools I never compromise on blades - intact I need to change my blade today it was not cutting as well the other day ready for a new blade - I dispose of old blades in a huge prescription bottle to protect myself and the trash people... or just inside something sealed my problem is I haven't been able to find the 5 packs anywhere lately and I love buying them that way - so I always have a sharp blade...