MARTELLI-Rotary Cutter. This 45mm rotary cutter can cut up to fifteen layers at a time without stress on hand and wrist. Spring loaded guard; easy blade replacement and comfort contoured grip. Cutter fits into the natural position of your hand for superb maneuverability. Perfect for arthritis; carpel tunnel; tendonitis or hand fatigue. Replacement blades can be purchased individually or in packages of five. This package contains one left-handed cutter: also available in right-handed (sold separately). Imported.