Fit for 2' x 4'' Lumber Hanger: Product Size: 2'L x 1.8'W x 3.7'H/ 51 x 45.5 x 94 mm. Our concealed joist hangers accommodate standard 2' x 4' lumber on the market(it also fits for wood of 1.6'-2'/ 40-50 mm width). Concealed-flange brackets feature straight edges for joist connections, and provide cleaner lines for visible applications to match your decor. Sturdy Steel Plate Structure: Plate thickness: 0.08'/ 2 mm. The outdoor accents concealed-flange is constructed with strong-hardness steel to keep away from deformation and scratch. Black powder-coated finish withstands the elements year after year and won't rust, corrosion in all seasons and climates. All Needed Accessories: Quantity: 24 PCs. Each concealed joist bracket included 2 self-taping screws and 8 wood screws. Having all needed connector screws can be cost-saving and time-saving on your installation. Note: If you need to mount the hanger on concrete or the steel plate, please change other tough screws (not included)