My cheapie paper trimmer

Is the blade blunt?

I don't know. But it has never managed to cut through multiple sheets cleanly and straight in a single pass, even when it was brand new.

 

It doesn't do very well slicing through 4-ply paper towels, either. I have a rotary cutter, and that also struggles, but more on account of not having something that presses down closely on either side of the intended cut; which is why I was hoping this device would do the trick.