Which type of punch does not require a hammer to mark an object?

A spring loaded punch is designed to mark an object without the need for a hammer. This tool operates by using a spring mechanism that provides the force necessary to create an impression on the surface. When pressed against the material, the spring releases, striking the object and leaving a clean mark. This feature makes it especially useful for applications where precision is needed and where using a hammer might not be practical or could damage the surrounding area.

In contrast, a center punch, prick punch, and impact punch rely on a hammer or similar force for their operation. The center punch is used primarily for making starting points for drilling, while the prick punch is used for positioning marks, and both require a manual strike to function effectively. An impact punch also relies on a hammer to deliver the necessary impact. Thus, the unique mechanism of the spring loaded punch distinguishes it as the only option that can create a mark without an external striking force.