Correct option is D
A center punch is a hand tool used to create a small indentation in metal, wood, or plastic to guide the tip of a drill bit and prevent it from slipping. The tip of a center punch is ground to a standard angle to ensure efficient marking.
· The standard grinding angle for a center punch is 90°, which provides a sharp indentation that helps drill bits stay centered.
· The conical shape with a 90° tip allows for easy alignment and precise drilling, especially in metalworking applications.
