No nails, glue or fasteners of any sort. Because the hook is canted backwards, under the mantle, the line of pull is straight down and the flat bar on top of the mantle holds the piece in place. The more weight that is applied, the harder is to move. Perfect for stone mantles. Important measurements are the thickness of the mantle and the return underneath the mantle. Specify these dimensions with your order. Availability: Usually ships in 2-3 weeks. Mantle Hooks mantlehooks$15.00, 5/$70.00Finish: Powder Coat no finish, will rust naturally (bad idea where rust is a problem) Powder Coat Color: Flat Black TextureGloss BlackCopper VeinSilver VeinRustDark GreenBright (Grass) GreenBright RedBlood RedBurnt OrangeMaroonSatin Clear CoatGloss WhiteFluorescent YellowFluorescent PinkPurpleGoldChrome-like ©2005-2011 Kestrel Ridge Forge, LLC | 972-839-9294 | Richardson, TX