Why should you avoid heating wrenches excessively?

Heating wrenches excessively can compromise their structural integrity, leading to weakened metal that may bend or break under stress. High temperatures can alter the properties of the steel, reducing its hardness and making it more susceptible to wear and deformity. Additionally, excessive heat can damage any protective coatings, increasing the risk of rust and corrosion. For safety and longevity, it's best to avoid overheating wrenches.