Universal Products - Universal - Bookends, Magnetic, 6 x 5 x 7, Metal, Black - Sold As 1 PR - Ideal for securing on top of file cabinets, metal desks and shelving. - Adjustable to fit large binders, manuals and files. - Magnetic base increases stability. Ideal for securing on top of file cabinets, metal desks and shelving. Adjustable to fit large binders, manuals and files. Magnetic base increases stability.