Correct option is D
Jigs are used to guide cutting tools like drills or reamers during machining operations.
Their primary purpose is to ensure
accuracy, repeatability, and interchangeability of holes during drilling or boring operations. They hold the workpiece firmly and guide the tool in the desired path.
Applications of Jigs:
Drilling: To ensure holes are drilled at the correct location, size, and angle.
Boring: To enlarge or refine holes while maintaining precision.
Fixture— It is a device which holds and locates the workpiece.
