Particularly strong adhesive strength; For hobbyists: Hooks can be unscrewed to fix other things to the magnet using the screws (metric thread M4); For anything that can be hung up, e.g. keys, signs or simple clothes; Stable: Steel casing; Ferrite magnet; Nothing can be lost: On a practical metal panel Size: 3.6cm H x 3.6cm W x 3.6cm D