Black Post Joist Anchor Connector Carbon Steel, Fit All 4x4, 4x6, 4x8, Joist Truss Beam Stabilization Linking Brackets Heavy duty wood working joist anchor brackets are adaptable to all 4 X's Carbon steel with black powder coating, 0.05” thickness Adjustable and fits to a 4 by 6 and a 4 by 8, 12 screw holes diameter: 0.16” Great for refurbishing and adding to deck, supporting, connecting joists, trusses, beams Specification: Material: carbon steel Finish: black powder coating