What Is An Environmentally Friendly Stapler

No staples are needed, and several sheets of paper can be easily stapled together with only "air". Made of plastic, it looks a bit like a double-layer birthday cake. However, there is a small seam under this "cake". Just put the paper into this seam, and then lightly press it like a normal stapler, and the paper can be easily "stapled" together. An oval hole was pressed out of the paper, and there was a slit on the edge of the hole, and the part of the paper that was pressed would not enter this slit.