Clips magnet base is designed with a smooth protective plastic shell to prevent scratches on the fridge whiteboard These metal magnetic clips manufactured with special plastic spraying process that gives them attractive bright colors and good durability Equipped with high-quality dual torque spring for long service, the clip mechanism is strong and the grip strength is powerful 4/5oz weight heavy duty magnetic clips, have a strong magnet that can hold up to 30 pages of letter paper without sliding Great for hanging on classroom whiteboard, home refrigerator, file cabinets, locker or any magnetic