Package & Size: 6 pcs Floating Shelf Brackets (mounting screws are not included), Product Size: 70 x 75 x 14mm / 2.8" x 3" x 0.55" (L* W*T); Mounting hole distance: 42mm/1.65". Sturdy and durable: These brackets are made of high quality stainless steel, precision welded, tough and durable, anti- corrosive, wear-resistant, anti-rust and non-flexible, providing strong bearing strength. Easy to install: With 2 mounting holes, use a few basic DIY tools for effortless installation in just minutes. Applicable Size: 3 inch deep shelf brackets are sturdy enough to safely support up to a certain weight, and support board width from 100mm to 300mm. Fully Concealable: Use a planer saw tool to remove 0.55" from the wood. Designed to completely hide behind your shelf, small profile for easy concealment.