Abstract: A method for fastening items (2) such as posters, photos or banners, which in the edge for hanging have a poster hanging bar or rail (3) manufactured from a magnetic material, to an object such as a poster roll up unit (15), which is provided with one or more magnets (5) to which the rail (3) can be connected, the magnets (5) being placed in a recess in relation to the object's surface. Poster roll up units (15) are provided with built in magnets (5) for fastening and fixing items (2) by magnetic connection between the magnets (5) and the rail (3), mounted in the item's (2) edge for hanging. Items such as posters are simply, inexpensively and efficiently mounted and fastened to objects such as poster roll up units (15), without safety risks and requirements for space.