Clamp bracket for 2 3/8" round post. Hardware included: (1) cast aluminum piece, (1) 5/16" zinc-plated steel bolt and washer, (1) 5/16"-18 zinc-plated steel U-Bolt, and (2) 5/16" zinc-plated steel nut and washer sets. Two U-Bolt Clamps are needed to secure one center-to-center punched sign on a single post.
U-bolt clamp bracket
Bracket is well made and meets my expectations.
Used these brackets to install eight parking signs at our church. Brackets were very easy to assemble and easy to attach the sign. I recommend them and will use them as the need arises.