Upgrade your front door with this stylish and practical 2-in-1 piece. It's a classic double crown design door knocker that also has a built-in 180-degree wide-angle peephole. Made from solid zinc alloy, it's strong, rust-proof, and has a sleek black finish. The peephole lets you see who's outside without opening the door, and it fits doors between 35mm and 50mm thick (about 1.38 to 1.97 inches). Installation is straightforward – you just need to drill two holes. It adds a touch of traditional elegance while providing a simple security upgrade. Perfect for homes, apartments, or even as a decorative touch on an interior door.