Function: Fixirons mounting bracket for mailboxes with a 20 cm wide base. Easy to install. High quality: The mailbox bracket is made of high-quality aluminum, is rust-proof, durable, and can support up to 136 kg. Installation: Step 1: Ensure the mailbox is correctly positioned and mark the position. Step 2: Place the bracket and pre-drill the hole for the screw. Step 3: Place the mailbox on the bracket. Step 4: Secure the mailbox to the bracket with the black screws. (Note: The black screw should pass through the aluminum bracket and match the mailbox mounting hole.) Note: Please use a drill to install this bracket. Package includes: 1 x metal mailbox bracket with screws. Note: The data is all measured manually. Please allow 1-3 cm tolerance. Color differences may occur due to different lighting conditions and display settings. Please refer to the actual item you received.