- Manufactured of 1 x 1.5 x .083 rectangular tubing for great strength-to-weight ratio. - Increases chassis stiffness and strength for improved handling. - Provides a safe, solid and convenient location for your jack. - Pre-masked areas for welding require NO removal of powder coat before installation. - Supplied with plastic end plugs to help keep moisture out. - Industrial grade powder coat for long life, to outlast the vehicle. - Added level of safety in event of side impact. - Can be used alone or with Stifflers Fully Integrated Technology (FIT)SystemTM.