Product List: 1 Flange Base, 3 expansion bolts, 2 side fixing screwsHeavy duty: Flange Base is made of metal material, solid round base structure, stable, strong, side fixing screws are freely adjustableUse: Chain Link Fence Pole Floor Flange is widely used for fence posts, lamp posts, mailbox posts, and other steel cylindrical basesEasy to Install: Drill a 0.47 inch hole for easy installation, put it on the floor and mark the hole position, fix it with expansion bolts, slide the post in and tighten it with screws on both sidesScenario: Chain Link Fence Post Base can be used for fences, mailboxes, railing decks, etc., and is a good choice for connecting concrete or wood applications to posts Specification: Material: Metal Size Chart: 145x110mm /5.71inchx4.33inch Inner Diameter 52mm Package Includes: 1 Flange Base3 expansion bolts2 side fixing screws Note: Please allow slightly errors 1-2cm differences due to manual measurement.