UT1 Ceramic Utility Blade Razor Sharp 4pack

I have purchased all kinds of blades for utility knives over the years, but these are by far sharper and hold their edge longer than any metal blades I have used. I know how, and have sharpened many metal utility blades, but they seem to dull out quickly. So far, these have remained very sharp in my use. The only downside that I know of with ceramic blades (all ceramic, not just these) is that they can be brittle. I am very satisfied with these blades, and will definitely purchase more of these when needed.

Picked these blades up because I wanted something that would not rust and is super sharp for my Z-knife. For those who don't know a Z-knife is used while SCUBA diving to cut lines away if you get fouled up in them. Sadly while the screws are stainless steel in my Z-knife and the body is plastic the blade rusts to pieces. So far I love these blades and after cleaning up my Z-knife it fit in place perfectly.Now for the bad thing about the blades. While they are super sharp and will stay that way a long time they can not be tweaked. Ceramic is very hard and brittle. In a Z-knife that is not a problem since the blade is well protected and line is pulled into the blade. In a regular blade holder you can not twist the blade at all as it will chip or snap ruining the blade. As long as you know that and handle the blades correctly they will last a long time.MuttMutt Outdoors

These blades are plenty sharp enough, and the seem to be quite durable. But they seem to be a little bit thicker than the metal blades that you normally get with different box knives. I've had to really work on them to replace the metal blades with these ceramic ones, and I've had one knife that worked perfectly fine with metal blades, but when I put one of these into it, it really didn't want to retract or extend the blade like it was supposed to. It seems that maybe the "waist" of the blade is a bit thicker than they are on the metal blades or some of the other ceramic ones, so it's catching on the side of the knife as you're trying to extend it. Overall, though, I've found these to be good, especially on the knives where you can fold out the blade, not use a spring mechanism to extend it.

The blades break at any side load but the edge lasts a long time if you do not twist the knife.

I have been wanting to try ceramic blades for a while, and I'm very happy, I would say they last way longer than 10x normal blades, now they are brittle and will break easy, I did drop one while retracted in the utility knife and was ok, but an hour later hit a metal bar under what I was cutting and broke the tip .I was cutting cardboard for 2 days with the first end of the blade before I broke it, normally a blade is dull in 15 to 30 minutes, these lasted 2+ days and never noticed it getting dull. I will definitely buy more when needed.

They are very sharp, and cutt very well. However I probably should have expected the fact that they have 0 durability to them. As long as you aren't cutting deep into something, and have the ability to cut completely at the same angle all the way across they are great. The second you slip or deviate from that though, they will snap.

breaks if using for prying

GREAT PRODUCT!!! EXTREMELY SHARP, WILL SEE HOW LONG IT WIL LAST VS STAINLESS STEEL. LIKE IT VERY MUCH.