What technique should you avoid when using pliers on nuts and bolts?

Using pliers instead of wrenches is a technique that should be avoided when working with nuts and bolts because pliers are not designed to provide the appropriate torque and grip required for these applications. Wrenches are specifically engineered to fit over nuts and bolts, allowing for a secure grip and more control when tightening or loosening them. Using pliers can result in stripping the nut or bolt, causing damage and potentially leading to injury as the tool may slip during use. Additionally, the design of pliers does not offer the same level of mechanical advantage that a wrench provides, making it more difficult to apply the necessary force in a controlled manner. Thus, using the right tool for the job is crucial for both safety and effectiveness in mechanical tasks.