The Fellowes SafeCut stainless steel assorted rotary blade kit offers design flexibility in a safe, enclosed blade cartridge! Each SafeCut cartridge has a retractable blade that only engages during cutting to prevent contact with blade surface. Kit includes three SafeCut stainless steel rotary blades: 1 wavy, 1 perforated, and 1 scoring. For use with Fellowes Neutron/ Neutron Plus, Proton, and Electron Trimmers. 3 pack.