Magnetack magnetic thumb tacks are magnetic pins used to hang pictures and posters without damaging them. Turn almost any wall or bulletin board into a magnetic surface. The best way to hang posters, photos, and artwork without damaging them with holes or tape. Each pack comes with 24 magnetic thumb tacks and 24 top magnets. Simply push the magnetic thumb tack base into the wall by hand, then place your poster or photo over the base tack, then use the top magnet to hang your item. Each Magnetack can be reused over and over again. They can be easily removed from the wall or bulletin board by hand and moved to another location or stored for future use. We use strong neodymium rare earth magnets on both the magnetic thumb tack base AND the top magnet, so you get twice the attractive force. Save your items from damage by using Magnetacks magnetic thumb tacks. No more holes in your posters, photos, or artwork!