Motion Pro - Jumbo Chain Tool KitUltra heavy duty tool for breaking and riveting roller chain. Specifications Pushes the pin completely through the chain link and rivets the same size chain with the included rivet adaptor Made from heat treated, chrome moly steel, the extractor pin is firmly guided by a removable guide fitting for long pin life When bolted to a solid surface, an air or electric wrench may be used to break chain Fits all 520, 525, 530, 630 standard or O ring type