Draw bars for overrun braking system with automatic reverse gear. FAD Assali offers the following range of draw bars suitable for use with overrun braking systems that include auto-reverse gear. These can be used on both single and two-axles trailers. These draw bars should be coupled with axles set-up for an overrun braking system (see the relevant section in this catalogue about brakes with overrun braking). The draw bars and brakes manufactured by FAD Assali are tested by TÜV and certified by KBA.