galvanized panel bracket for 12" trailer roller

5" long slots on 10" center, 1/2" or 5/8" shaft. brackets are one piece, heavy duty hot dip galvanized 11 gauge steel, specifically designed to support keel rollers. slots accept 7/16" or 1/2" diameter bolts and provide vertical roller adjustment.

a = 3-1/4" b = 12-3/8" c = 7"