National Hardware N100-792 15 Bar Holder in Zinc plated, The product is Zinc, Open Bar Holder, For Use With 2x4. Elegant and smooth finish The product is manufactured in China Manufactured from hot rolled steel Designed for use with 2 x 4 lumber Use with National's # 14 bar holder LifeSpan Limited Lifetime Warranty Secures shed and other small doors Manufactured from hot rolled steel Designed for use with 2 x 4 lumber Use with National's # 14 bar holder LifeSpan Limited Lifetime Warranty Secures shed and other small doors