Here is everything you need to hang one picture perfectly! Hardened blue steel nails with brass collars are reusable and leave only a pin-sized hole on wall surface that can be easily painted over. 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: For objects weighing up to 30 lb. Ideal for plaster/drywall surfaces For wooden frames only 7 piece kit Contents: Blue steel pro nail 9 ft. wire coil 2 D-ring hangers with 1-hole 2 screws Pro hanger