OKNIFE Premium Ceramic Utility Knife Blades, 10-Pack - Zirconium Oxide Flat Brushing Polishing Blade Compatible with Otacle U1,U1 Pro & U1 Ultra, Fits Most Utility Knives (White)

Very sharp and stay sharp. They’re brittle and may break if flexed. I use mine for opening boxes and cutting cords. If you’re using it for other stuff—don’t—unless you’re prepared to replace. If all you do is snap off the tip, just turn it around in blade holder. Voila! Not cheap, but worth it to me.

Very sharp. High quality

These are great blades, they can chip but then they are serrated, they are a little thinner than steel but seem to work all the knives ive tried

These knife blades work very well! They cut through cardboard over and over again. I have yet to replace the blade.

Great blade for cutting, easy to break for industrial use.

Blades were as described. Just be aware, they are very brittle. They are super sharp, and do hold their edge longer than the steel blades, but they typically break before they start to get dull enough to be replaced.

Super sharp

Definitely very well made easy to replace

Nice

Exactly what I was looking for. Beats the steel blades. Retains sharpness longer, more corrosion resistant. Good quality