Galvanized Steel trailer roller Bracket 1. one piece roller bracket 2. slot for vertical adjustment. 3.size:5", 8", ... 10",12" Galvanized Steel trailer roller Keel Mount BracketOne piece roller bracket with slot for vertical adjustment. Mounts with ... and is designed to be used with a 5/8" roller shaft.1.Size: 5", 8", 10", 12"2.Package: carton ...