RV Designer Sway Control Clips. Sway control clips assist in attaching trailers to tow vehicles. These pins feature zinc plated steel construction to prevent rust and corrosion. The clip's diameter is 5/8". Each package contains two sway control clips. Features of RV Designer H408 Sway Control Clips Assist in attaching trailers to tow vehicles Replaces any damaged or missing sway control pin Feature zinc plated steel construction to prevent rust and corrosion Clip Diameter: 5/8" Each package contains two sway control clips Package Contents: RV Designer H408 Sway Control Clips RV Designer H408: Sway Control Clips