Boating Essentials Zinc Plated Roller Shaft helps anglers keep trailer rollers tracking right for smoother loading and unloading before bass, walleye, salmon, or crappie trips, giving the trailer dependable support where hull contact matters most. This roller shaft fits 4 in., 5 in., and 8 in. rollers and includes galvanized washers that add corrosion resistance for repeated use around ramps, spray, and wet storage conditions. A stainless steel cotter pin secures the assembly and helps keep the shaft locked in place during travel and launch prep. For trailer maintenance, roller replacement, or general rigging work, this shaft gives boat owners a practical hardware solution that supports stable performance and reliable assembly. Fits 4 in., 5 in., and 8 in. trailer rollers Includes galvanized washers for added corrosion resistance Stainless steel cotter pin helps secure the shaft during use Supports stable roller performance and reliable trailer assembly Roller size (in.) Shaft dimensions (in.) 4 5 1/4 x 1/2 5 6 1/4 x 5/8 8 9 1/4 x 5/8