What should the squared edge of a chipping hammer be for optimal results?

The squared edge of a chipping hammer should ideally measure between 1/16 to 1/8 inch for optimal results. This narrow width allows for more precise chipping and helps in removing rust, scale, or old paint from surfaces without damaging the underlying material. A squared edge of this size is effective in reaching tight spaces and providing control over the impact during chipping.

Using a more substantial squared edge, like the ones found in other options, may compromise the ability to execute fine work or detailed removal, making chipping less efficient. Keeping the squared edge within the recommended dimensions ensures that the chipping hammer functions effectively and extends its usability while maintaining the integrity of the underlying surfaces being prepared.