This is the Standard Boom Lock Kit for a Holmes 600 Wrecker. This pin is used to hold the 2 booms together. You can pull this pin to unlock the 2 booms and rotate the booms to the side if you have a side pull situation. This kit includes a plunger pin, spring, and pull grip handle assembly. Includes:(1) Plunger Pin(1) Spring(1) Flat Washer(1) Pull Grip Handle Assembly
