Lockout hasps are devices used to isolate equipment from its energy sources, preventing unauthorized operation during maintenance or repair. Typically, a lockout hasp has a metal body with several slots where locks can be applied. It is attached to the energy-isolating mechanism (such as a valve handle or circuit breaker) to secure the equipment in a de-energized state. Lockout hasps come in different sizes, materials (like steel or aluminum), and configurations, allowing for multiple locks to be applied at once. This feature is particularly useful when several employees are involved in the maintenance of the same equipment.