MAGNETIC: The magnet on the back of the marker holder is strong enough to firmly attach to any metal and magnetic surface without slipping or falling off. Adjustable/Removable BlocksThe container has removable dividers and 3 slots, you can adjust the size of each compartment to fit any size object. Usually, it can hold up to 12 markers or 2 erasers, saving you the trouble of taking/losing pens. Wide Range of Daily Applications: In addition to holding any office/home stationery (markers, pencils, pens, chalk, notes, rulers, etc.), small items such as keys, clips, toothpaste, toothbrushes, condiment packets, disposable gloves, plastic bags, etc. Efficient StorageBy fixing this holder to a metal surface, you no longer need to fumble with small objects in the draw in the kitchen; when studying, you save yourself the trouble of opening and closing the pencil case; even in the bathroom, toothpaste and toothbrushes can be well separated; more places of use are waiting for your discovery. Package and Size 1 pack of magnetic whiteboard holder per set; 4.9*4.7*1.5 inches.