What is the primary purpose of a chisel in automotive repair?

The primary purpose of a chisel in automotive repair is indeed to cut rounded-off nuts. In situations where bolts or nuts become stripped or rounded due to wear, damage, or improper handling, a chisel can be used to create a notch or groove to allow for better gripping and removal. This technique is especially valuable as it provides a mechanical advantage for extracting stubborn fasteners that cannot be easily removed by conventional means.

Using a chisel effectively requires a proper understanding of materials and the application of force, as it is important to avoid causing additional damage to surrounding components. Thus, the chisel serves as a critical tool in a mechanic's arsenal, enabling them to address specific challenges encountered during repair work effectively.