OLFA 9070 LBB-10B 18mm UltraSharp Black Snap-Off Heavy-Duty Blade, 10-Pack

The absolute champion of craft knives, Olfa should be way more popular than they are. Sharpest blades I've used bar none, make Irwin and Stanley blades seem like cheap cutlery. Good value price too, as these stay sharp for ages. The only downside is that they can snap quite easily if abused. That's not an Olfa problem though, that's a me problem.

Whilst slightly more expensive than the standard blade’s these are extremely sharp and so far have performed really well and maintaining their edge.

Best snap blades I’ve had. Will be buying again.

They stay sharp for a good time, they don’t drag (even wet wallpaper)I’m so happy that I found them.

Use these blades all the time when Wallpapering, super sharpe.

Ideal

These blades are so sharp. You have to be careful not to cut yourself just putting them in the knife.I use the mainly for cutting. I never snag as long as you break them often enough.

The blades are structured so that when the tip is blunt, one section can be snapped off and a new sharp tip is available. I likes the graduations on the back (in 5 mm steps) which allow the circle radius to be set to ± 1 mm easily - a bit better with an additional ruler and some care. It took a little practice, but even on the second attempt I got a perfect circle. I was cutting thick, relatively soft material and setting the point was important to limit the drag of the arm on the material. This is the only tool of this type that I have used recently, so I cannot compare with other options.