I'm sure someone on here can help identify the name of this (very rusted) bracket. We've seen it several times but we don't know what it's called or where to get it. A couple of these are used at the top of a wooden sign with the bolt going through the sign. An anchor shackle was then used to connect the sign to a chain. What looks like two nails is the rusted out bolt. Any help would be greatly appreciated. Thanks!