FISKARS-TripleTrack Refill Blade Carriages. Designed to work with Fiskars TripleTrack Personal Paper Trimmers only. The cutting blade cuts up to five sheets of 20lb paper or two sheets of heavier cardstock. The unique TripleTrack rail design allows the blade carriage and rail to interlock, making straighter and more precise cuts. This package contains two cutting blade carriages. Caution: Sharp edge. Handle with care. Imported.