The National Hardware Low Damage Wall Hanging kit is designed to help you hang pictures, mirrors, and other decor items without heavy damage to walls. Zinc Plated finish for style and Steel material for durability. No mounting hardware needed. Low Damage Wall Hanging kit includes 4 Push & Hangs, 4 J Hooks, and 1 Thumb Saver. Thoughtfully designed kits offer flexibility and easy to install in any room. Safe working load of 10 lbs per hook. National Hardware's Lifespan™ Limited Lifetime Warranty