Cool Hand 18mm Zirconia Ceramic Snap Off Utility Knife Blades, 10 Pack

Excellent and lasting sharp edge. Great for insulation and styrofoam

They work good and cut very well, but they break way to easily. It's an okay one time purchase, but I won't buy them again for that price

No spark ceramic snap off blades. Work well for pyrotechnics.

Only 3 fit. There rest where too large. The bevels are not even. I got these for half off on a sale. Took a chance. Giving an extra start due to the 3 that do fit, do cut so far. I plan to resharpen with diamond lapping films. So I won't use the break off function for a while. So i don't know if it works.

The long blade knife that I have came with two ceramic long blades. EACH ONE of those ceramic long blades lasted for over a month for what I use them for. These ceramic long blades can't even last a day before the completely break. I don't really know what to say to anyone looking for spare blades of any kind anymore though really. I guess that once the blade is dull for whatever cutting device it is that you have, the whole thing is just trash... In the long run it will be cheaper to just get a whole new one, instead of attempting to get replacement blades out here, and failing over and over again. Unless you're lucky enough to have a knife that has replacements available from the same company that made the knife in the first place maybe. But that seems to be rare in my experiences.