I Might Have Gotten a Dud
To be transparent, I bought this from a different retailer. I LOVED this trimmer for the rulers that flip in and out and for the metal wire that indicated where the trimmer would cut the paper. What I really didn't like was that the blades would dull after a few cuts and then absolutely shred my cardstock. I'd replace the blades and the same thing would happen. I contacted Fiskars and they sent me a warranty replacement. It was a repeat experience unfortunately. Basically, I don't believe this trimmer is meant to cut thicker cardstock. If you are only going to use it to cut thin paper like copy paper, this trimmer will do just fine. If your hope is to cut thick cardstock, this trimmer is not for you as the blades will dull SUPER fast.