Specifications: Package includes 2 pack T shelf bracket, 16 pcs screws; 3/8" thick by 2-1/2" wide, 14" length (exposed length after hidden installation is 11.5"). Vertical length is 11", width of 2-1/2",High Quality Material: This floating shelf brackets made of galvanized steel with black coating, can hold about 200lb per, keep the hanging shelf bracket from corrosion and rust,Modern Design: Once installed this support bracket will be virtually invisible, the design provide more open space for chairs and legs,Wide Application: This heavy duty shelf bracket with heavy loading capacity can support various countertops, such as marble, quartz, granite countertop,wall bench seats, heavy wood boards and so on. high bearing capacity and sturdy enough,Easy to install: Each T bracket has 8 countersunk holes, and the holes reserved on the support surface can be used to fix the wooden countertop.Package include enough stainless steel screws