The Security Chain 48" - 108" Security Chain Company Smart Bar is the perfect solution for your cargo. This adjustable bar can be used to secure a range of cargo, from small pickup truck beds to full high cube trailer widths. The square tubing provides a stronger bar than round tubing, giving you peace of mind that your cargo is secure. With the Security Chain Company Smart Bar, you can rest assured that your cargo is safe and secure. FleetPride is your First Click in Heavy Duty®.