Which method helps prevent tools from dropping when working at heights?

Clipping tools to harnesses is a crucial safety measure designed to prevent tools from falling while working at heights. This method involves securely attaching tools to a safety harness or lanyard, which ensures that in the event of a drop, the tools remain attached and do not fall to the ground. This not only protects those working below from potential injuries caused by falling objects, but it also helps improve efficiency by ensuring tools are easily accessible and won't be misplaced during a task.

Using a heavy toolbox might seem like a way to keep tools secure, but it does not address the risk of tools accidentally dropping while in use. Tying tools together may create a mess and could be impractical, potentially leading to other safety hazards or complications. Using magnetic tools has limited applications and may not be suitable for all types of tools or working conditions, making it less effective at enhancing overall safety when working at heights. Thus, clipping tools to harnesses stands out as the most effective method for preventing drops and ensuring safety.