... ,washable, pro-environmen,traceless,Traceless,household necessities .4. easy to stick on&removable&reusable& &convenient5. Magic hooks No mucilage glue6. Nice ... the protective film.3.Cling the hook on the wall; extrude the film outward along the hook with thumb. Drain the air out ... , it can hang articles. If you leave the hook 24 hours on the wall,ad then hang articles,the effect is the ...