Heavy-Duty Load Capacity: Our T-shape floating shelf brackets have an impressive weight loading capacity of 200lb per pair, ensuring sturdy support for even the heaviest countertops or shelves. There are six screw holes at the vertical part to increase its loading capacity. Two pieces of 3/8 thick steel are weldged together making it a heavy duty countertop support bracket. These floating shelf brackets are built to handle the weight with ease, providing peace of mind for your storage needs. Various Size and Amount Package: With a horizontal support measuring 2 1/2" wide x 3/8" thick x 12 "long and a vertical mounting flange of 2 1/2" wide x 12" long x 3/8" thick steel, these granite countertop brackets offer the perfect balance of strength and size. Their dimensions make them suitable for various countertop and shelf configurations, accommodating different spaces and requirements.