Quality gate hinge. Used this on a recent yard wood fence project. Very sturdy and well manufactured product. I mounted these to sms 4x4 redwood posts but had to cut down the mounting because they overhang the post. There were no dimensions in the product description or installation instructions, but would say these are designed for posts 5x5 or larger. I chose these because of the specs needed for the width of the gate I was installing. The nice thing about this hinge is that it is adjustable from flush mount to an offset. I needed the offset because the gate I made was 1.5 inches thick and centered on a 4x4 post. It worked perfect for this.