Indexing letters on movable anvil and body ensures correct tool configuration; simply line up the letter on the anvil to the letter on the body to get the configuration needed Versatile design will remove chain pins, press master-link plates and rivet hollow nose and soft nose (quad stake) master link pins on O-ring and non O-ring type chains Will press, break and rivet 520, 525 and 530 chains with one convenient tool All components conveniently store on tool when not in use May be supported in a vise or held with included handle Great for the professional technician or DIY mechanic Compact and light enough to carry in a tool bag for trailside repairs PBR = press, break, rivet. TOOL CHAIN BREAKER PBR