Sturdy Joist Hangers: The concealed joist bracket is made of steel, no deformation. coated, No easy rust, sturdy and durable. Product Size: Our 2X4 joist hangers accommodate standard 2x4inch lumber on the market. Practical Desing: Concealed Joist hangers are connectors designed for the installation of joist ends in wood frame construction, allowing temporary positioning and fixing to make installation easier and faster. Widely Use: The hidden joist hanger is installed of and serves as a stable support kit.It is suitable for indoor and outdoor use, such as , handrails, swings, tree houses and fences. Material: steel colour: black Package Contents: 4 x Railing Bracket 1 pack screws Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.