Is it time to change utility knife blades?
I mark my freshly changed utility knife blades so I’ll know whether they will need to be changed after I flip them to a fresh edge. The main advantage is that it saves me the frustration and disappointment of flipping to an already-dull edge.
I just put in a fresh blade and marked it with a sharpie
Flipped the blade for a fresh edge. When it dulls I see I'll have to change blades