Use for displaying art posters signs name cards decorations project work and much much more. Use in classrooms hallways libraries media centers - anywhere theres a grid ceiling. Non-magnetic so they work on plastic grids too!. Hang stuff from your grid ceiling without standing on anything but the floor!. Grid Clip Strings - all-purpose strong polyester 48 strings with 2 unique metal grabber ends for amazingly easy threading. These strings work Ceiling Hanglers items or use them for a variety of creative uses. 10 Per bag. 33 Pack = 30 Strings.