Anti-roll Back Magnet

Anti-roll Back Magnet is a replacement part for an anti-roll back (ARB) assembly on a rollercoaster. ARB systems are used on roller coasters to engage a mechanical catch dog in the unlikely event of a lift chain break and act as a secondary safety device stopping backwards movement of the ride vehicle.
The Anti-roll Back Magnet is automatically tested each time the ride vehicle goes through the station and gets a Go or No go from the system.