Display documents notices photographs and posters on magnetic boards and appropriate metal surfaces with Quartet Matrix 0.4-inch disk-shaped silver magnets. Post announcements bills or visual aids on whiteboards with these round silver magnets. Their high-strength build provides sturdy placement of thick paper and card stock onto magnetic surfaces. For other uses this 50-pack of versatile Quartet Matrix round magnets is suitable for marking plotting line graphs and making DIY fridge decor. • Magnets hold documents and signage to magnetic boards and signs. • Silver magnets/clips. • 3/8 diameter. • Comes in pack of 50. • Sold as 50/Pack.