Package and Size: 6 Pieces Floating Shelf Brackets (Mounting screws are 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 ". Applicable Size: 3 inch deep shelf brackets are sturdy enough to safely support up to a certain Sturdy and Durable: These brackets are made of high quality stainless steel, precisely welded, strong and durable, anti-corrosion, wear-resistant, anti-rust and non-flexible, providing strong bearing force. Sturdy and durable: The invisible wall shelf bracket is made of high-quality steel, nickel-plated, rust-proof, abrasion-resistant and corrosion-resistant, and the surface is matte and shiny, smooth and Burr-free. Hidden Design: The heavy-duty invisible bracket design creates a unique floating effect: after installation, the screws and brackets are completely invisible, making your shelf appear to be floating in the air. Wide Range of Applications: Invisible shelf brackets are a great way to save