Use these super-strong magnets to hold or hang heavy objects throughout your classroom. Made with neodymium magnets, each has a hook that can swivel up and down. Hook holds approximately 20 pounds from a vertical position and approximately 10 pounds from a horizontal position on heavy steel. Holds approximately 1 lb. on a whiteboard and approximately 8 lbs. on a metal door. Measures 1" diameter, with a 2-1/2" long hook, includes 2 hooks per package