TURN YOUR MOSAIC CREATIONS INTO A MAGNET! THIS SUPER STRONG MAGNET CAN HOLD UP TO 3 LBS AND IS ONLY A 1/2'' ROUND 1/16'' THICK. CHROME-LIKE, DUST-FREE FINISH. OVER 10 TIMES MORE POWERFUL THAN ANY OTHER ORDINARY MAGNET. THEY ARE SO STRONG YOU CAN POSITION ONE ON EACH SIDE OF A WINDOW TO HOLD A PIECE; OR EVEN PLACE ONE/TWO MAGNETS INSIDE A PIECE AND IT WILL STILL STICK TO METALLIC SURFACES.