Used by museums and art galleries worldwide, the hardened blue steel nails with brass collars are reusable and leave only a pin-sized hole on a wall surface that can be easily painted over. Each hook's unique hand welded center-of-gravity easily guides the nail straight into the wall at the perfect angle for a secure hold. The reinforced elbow of the hook adds support. Weight ratings are based on hangers nailed into studs and are not cumulative, so two hangers will not hold double the weight. For best results, choose a recommended weight rating that greatly exceeds the object to be hung. Details:Brass12 hanging sets (34 pieces per set)For objects weighing from 10 lb. to 100 lb.Hang up to 17 objectsIdeal for plaster and drywall surfaces Pack Contents:15 standard nails3 extra long nails4 hangers rated at 10 lb.3 hangers rated at 20 lb.3 hangers rated at 30 lb.1 hanger rated at 50 lb.1 hanger rated at 100 lb.4 padded wall protectors