Fiskars 199020-1002 / 12-9902 - 12 inch / 30cm Desktop Rotary Trimmer - Blade Style F. 12 inch/30cm Desktop Rotary Trimmer. Cut up to 10 layers of paper with precision. Features include: 1/4 inch grid lines for easy and accurate measurements; blade carriage for safe and easy two step blade changes; blade carriage keeps the blade visible yet protects your hand; the cutting bar prolongs blade life; smudge guard to hold things in place while avoiding messy fingerprints on your paper; rail lock for safety when moving or storing your trimmer. This trimmer uses blade style F. It comes with one straight blade. Other blade designs available are scoring, perforating, deckly, pinking, wave and scallop.