The JDS Pulling Tool is designed for running and retrieving equipment or subsurface tools with an external JDS fish-style neck. The tool features a field-adjustable core, enabling users to modify its reach based on specific needs. It operates by jarring down to shear off a subsurface tool or fish, which is particularly useful when a jar-up tool is not desired. This adaptability makes the JDS Pulling Tool ideal for setting tubing stops and retrieving subsurface tools, ensuring efficient and safe well bore operations.