Martin Yale W24 Premier GreenBoard Wood Series Paper Trimmer, 24" Cutting Length, 20 Sheets Capacity, Ergonomic Soft-grip Handle The original and still a favorite! Can cut up to 18" x 24" papers. Fully-hardened self-sharpening high-carbon steel blade ensures a precise cut and long-lasting edge. Cuts mat board, cardboard, film, tissue and textiles. Safety features include a patented automatic blade latch that locks with every cutting motion and a finger guard that protects the entire length Heavy-duty 3/4 Inches thick wood base Kindly refer to the user manual for operating instructions