PRICK PUNCH PRICK PUNCH The tip of the Prick punch is 40 degree. A prick punch is similar to center punch is used for marking out. Prick punch tip is sharped angled tip to produces a deeper indentation. Prick punch is also known as a Dot punch. CENTER PUNCH CENTER PUNCH Center punch is used to mark the center of a point. It is used for mark the center of the hole when drilling holes. SURFACE PLATE SURFACE PLATE It is flat plate used as the horizontal reference plane for precision inspection.