I have the red Martelli cutter, which is a 45 mm, and it really keeps your wrist straight when you use it. They make a left handed cutter, too. Their blades are very sharp. Happy customer here. I don't know if they have a 60 mm cutter, though, you'd have to look into it. Their customer service is also very good. I had a problem with the spring on mine and they replaced it lickety split.