6 Pcs Metal Floating Shelf Brackets, 3 Inch Hidden Brackets Support Floating Shelf Concealed Bracket for Wall Mount. Sturdy and Durable: These brackets are made of high-quality stainless steel, precision welded, strong and durable, corrosion-resistant, wear-resistant, rust-resistant, and non-flexible, for strong load-bearing capacity. Easy to Install: With 2 mounting holes, use a pair of basic punching tools for easy installation in just a few minutes. Applicable Size: 3-inch deep shelf brackets are sturdy enough to safely bear a certain weight and support a board width from 100mm to 300mm. Completely Concealable: Use a planer saw to remove 0.55 inches of wood. Designed to be completely hidden behind your shelf, small profile for easy concealment. Packaging and Size: 6 Pcs floating shelf brackets (mounting screws not included), product size: 70 x 75 x 14 mm / 2.8 \" x 3 \" x 0.55 \" (L*W*T); Mounting hole distance: 42 mm / 1.65 \".