(39-Hook) Creative Multi Function Invisible Hardwall Drywall Picture-Hanging Hooks Clock Hanger Non-Trace Wall Picture Hook Frame Wedding Photos Mirror Wall Studs, White Easy to use and could apply to a variety of surfaces Composed of durable, long lasting materials, the strongest hook could load weight 15+ lbs Totally 37 pcs and its multi-function is a must have for every family Suitable for hanging keys, umbrella, clothes, photo frame, metope adornment , etc. Suitable for hard wood and solid walls. NOT suitable for stud walls.