Wide range of applications: Due to years of rain erosion and damage caused by lawnmowers and other yard maintenance equipment, wooden posts appear at the bottom of the foundation, which will make the bottom fragile to rot and break, adjustable bollards can be used for mailboxes, fences, swings, deck railings, Log houses and other wooden posts. Waterproof, anti-rust, the surface is sprayed with high-temperature powder texture baking paint, which can be firmly adsorbed on the surface and scratch-resistant, beautiful and durable, and will not be easily scratched like ordinary paint. Adjustable rear protector: telescopic component, suitable for installation range: 3.3 inches to 6 inches. Minimum component/3.3 inch, maximum component/6 inch. INSTALLATION METHOD: Overlap each other by specification of wooden column, Before fixed by screw. EASY & FAST! This Fence/Mailbox Post protector prevents damage to the bottom of the post caused by yard maintenance equipment (LAWN MOWERS, TRIMMERS), And protection for your Deck, Mailbox, Fence Posts, etc. Note: Installation guide not included, we strongly recommend you seek professional installation. Please check as much as possible to make sure the item is what you need. Tips:The product may be updated constantly,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use The bolt color is random, and the specification is not accepted. Colour:As Shown Material:iron art Package Contents: 1 * Adjustable post protector set