The Martelli cutter is great! I have had 1 for at least a year & it is still sharper than my Fiskers with a new blade. It's a 45mm blade so I'm sure it will work in other cutters. When I bought it, I was told I could use the Fiskers blades if I wanted to. Am thinking I will buy some Martelli blades to have on hand, just in case. Maybe I could use them in the
Fiskers cutter even though I have 3-4 5 pk for that cutter.