Bookends with anti button design: anti point to avoid slipping at the desk, helps to keep the bookend more stable HEAVY DUTY BOOKENDS Each pair weighs up to 390g, metal iron material with electrostatic spray surface, smooth and flat to use. Metal Bookends 165 x 80 x 125 mm, very sturdy to hold your books Non-slip book ends, nice design: simple and cute cat look, simple and practical sturdy book to protect your books and CDs Applications for bookends: universal use for books, files, magazines, DVDs, movies and so on