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The general pushpins have limited use when the thicknesses of posters or papers are too thick or too thin. The pin cant tightly fasten diverse posters or panels because the needle lengths are not adjustable. Therefore, Rotary Pin proposes a new design which can change the length of needle and fix posters/panels firmly and immediately. If papers are thin, the pin needle will resolve to be short length which is suitable for thin papers. For thick panels, the users can adjust the needle of Rotary Pin with longer needle length and provide proper attachments. This design can help people to nail panels or papers strongly for different features.