This product cuts the corners or edges of notebooks and planners to create index. Just insert the paper into the body and press the button. You can quickly reach the page you want to look, just place your finger on the part you cut-off. No need to worry the index and tub, bent or come off in the bag anymore. It has two types of shapes for cutting. One is for the paper corners and the other is for the edges. Size: W1.38xH1.38xD0.8inch SUN-STAR Inner Index Tab Maker TSUMEKAKE for Notebook, Planner, Corner Punch for Easy Open Page, S4139291