Which of the following tools does NOT relate to welding safety?

The correct answer is based on the context of safety equipment specifically designed for welding processes. Welding gloves, helmets, and goggles are all essential protective gear used to protect a welder from various hazards associated with welding, such as heat, sparks, and harmful radiation.

Welding gloves are designed to protect the hands from heat and sparks, welding helmets shield the face and neck from intense light and flying debris, and welding goggles are used to protect the eyes from the bright light and UV radiation emitted during welding.

In contrast, a wire scratch brush does not provide protective measures directly related to the safety of an individual during the welding process. Instead, it is a tool commonly used for cleaning metals by removing slag, rust, or other contaminants prior to the welding operation. Therefore, it does not fulfill a safety function like the other items listed, which is why it is identified as the option that does not relate to welding safety.