RT-215 Bidex Professional Rotary Trimmer, 10 Sheets, Metal Base, 11-inch by 18-1/2-inch. Count on precise cuts with the premium carbide blade. Premium carbide blade combines with a patented rail system to hold paper firmly to ensure a clean edge and exact cut. Sturdy metal base is calibrated with inches, metric rulers and features preset measurements for common-sized items. Updated graphics, rulers and grid make it easy to trim materials. Optional -inch B-Series-inch replacement blades provide 11 cutting designs for virtually any craft or scrap booking project.