Problems with arthritis, carpel tunnel syndrome, tendonitis, hand fatigue, neck or arm pain? Then the Martelli ErgoCutter—the only truly ergonomic rotary cutter! Unlike traditional rotary cutters, the Ergo Cutter is held in a natural position with your arm and hand evenly distributing all of the pressure. Cuts round, scalloped, patterned shapes. Blade guard closes with a flip of a finger.