Boat Trailer Roller Split Panel Brackets - GalvanizedTie Down Engineering's Trailer Roller Split Panel Brackets are sold in pairs (left & right) to allow use with varied roller widths. Holes on the brackets are sized to work with either 1/2" or 5/8" roller shafts. Slots allow vertical adjustment using 7/19" or 1/2" U-Bolts for stabilizing the boat on a trailer.Features: Hot dipped galvanized finish; Slots accept 7/16" or 1/2" bolts; Roller shaft diameter can be 1/2" or 5/8"; Sold in pairs (left and right);