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)

sharpness 8/10edge retention 10/10cool factor: priceless

They work like they’re intended. Nothing else will work either the knife do to the screw holes

Good producto

i replaced the blade on the Milwaukee Fastback, so far so good, keeping the edge sharp.

Great product and of course it's razor sharp

almost to sharp if that is possible

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.

They must be the sharpest blade in the market, but they brakes very easily.I will not buy them again!