Martin Yale W18 Premier GreenBoard Wood Series Paper Trimmer, 18" Cutting Length, 20 Sheets Capacity, Heavy-duty 3/4" Thick Wood Base, Ergonomic Soft-grip Handle Heavy-duty 3/4" thick wood base, Through-hardened steel blade cuts up to 20 sheets at once Accurately cuts paper, matte board, cardboard, film, tissue and textiles, Patented automatic blade latch locks with every cutting motion Permanent 1/2" grid and dual English and metric rulers help to ensure proper alignment Finger guard protects entire length of blade Ergonomic soft-grip handle, Non-skid rubber feet