Innovative design will Press, Break and Rivet 520, 525, and 530 chains with on convenient tool. Versatile design will remove chain pins, press masterlink plates and rivet hollow nose and soft nose (quad stake) master link pins on O-ring and non O-ring type chains. Easy to use design allows you to change tool functions by simply moving the position of the anvil block. Indexing letters on movable anvil and body insures correct tool configuration. Simply line up the letter on the anvil to the letter on the body to get the configuration you need. All components conveniently store on tool when not in use. All steel construction with heat treated components for strength and durability.