Left hand hinged locking car stop, C5-3X. Stops are bolted through web of rail. Equipped with padlock for locking in upright or lowered positions. Car stop folds away from rail to outside of track. For rail 60 pounds and up. Weight: 94 pounds. For exposed rail track. Car stops are for flat track only. Car stops must be used in pairs. Use bumping post inside building. Product of Aldon ® Company.