Material: Made of heavy steel Q235, surface is treated with black powder-coated finish, keeps the rear anchor from corrosion, it is not easy to fade. Multiple Usage: Wooden posts can be fixed by post sleeves for added safety. It can be widely used in many places where wooden posts need to be anchored, including deck brackets, porch railings, post stands, table legs, etc. Applicable: For 4 x 4" posts, the actual inner diameter of the post bracket is 3.5" x 3.5", allowing 4 x 4" wood posts to be installed. The standard diameter can prevent the wood post from swaying. Come with screws: 8 short screws (horizontal mount) for posting; 8 sets of expansion bolts(vertical) to the deck floor. Can be used to securely attach brackets to wood or concrete floors. Easy to install: All you need just use a wrench to tighten the screws to hold the stakes in place, done!