The original and still a favorite! Through-hardened, self-sharpening, high-carbon steel blade. Cuts paper, mat board, cardboard, film, tissue and textiles. Patented automatic blade latch locks with every cutting motion. Finger guard runs entire length of blade. Torsion spring prevents blade from falling. 1/2"" grid and dual standard and metric rulers. Ergonomic soft-grip handle. Heavy-duty 3/4"" thick wood base with non-skid rubber feet for extra stability. Trimmer Board Type: Bypass; Sheet Capacity: 20; Cut Length: 18""; Blade Material: Hardened Steel.