This product can be used to hanging photos or calendar and also can be used as key holders or pen clip on the whiteboard. Perfect for home, kitchen, office and school, the uses are endless. Super strength magnets are strong enough to hold 30 sheets of A4 paper at once, they also will not become weaker as time goes on. The smooth polished magnet makes contact with the surface directly. Anti-scratch sticky pads are added for better grip on a smooth surface and further protection. There is no need to worry about the scratches any more.