15 Paper cutter supports trimming B4, A4, B5, A5, B6, B7 papers; allowing cutting 12 sheets B4 papers at the same time Alignment grid and ruler with millimeter scale for accurate measuring Solid steel construction for ensuring stability and durability Arm lock for locking the blade when not in use to avoid accident injury; cutting blade with handle bar for comfortable holding Widely used on cutting papers, photos and other paper DIY handicrafts; perfect for offices, schools, photo studio, etc