OOK professional picture hanger. Used by Museums and Art Galleries worldwide. Will not damage your walls. OOK professional hangers are reusable. Brass finish. Nails included. No. 533018: 5 lb. hanger, 4 per card No. 533020: 10 lb. hanger, 4 per card No. 533022: 20 lb. hanger, 3 per card No. 533024: 30 lb. hanger, 3 per card No. 533026: 50 lb. hanger, 2 per card No. 533028: 75 lb. hanger, 1 per card No. 533030: 100 lb. hanger, 1 per card