What tool is used for making precise light marks for hole centers?

• A. Combination square
• B. Prick punch
• C. Drift punch
• D. Pencil compass

Answer: (B)

The prick punch is specifically designed for making precise and light markings for hole centers on various materials. This tool features a sharp point that creates an indentation on the surface, allowing for accurate placement of drilling tools or other fasteners. By using a prick punch, you can ensure that the marks are not too deep, thereby preventing any damage to the material or interference with the workpiece's integrity.

The other tools listed serve different purposes. A combination square is primarily used for measuring and marking right angles and determining exact lengths, rather than creating center punch marks. The drift punch is utilized to align or adjust holes and does not create light marks suitable for starting holes. The pencil compass, while useful for marking arcs and circles, is not designed for pinpoint accuracy needed for hole centers. Thus, the prick punch stands out as the most suitable tool for this specific task.