Material: Made of high quality molybdenum steel, it has a much higher strength than normal steel, designed for better durability and reliability. Fits chain sizes 420, 428, 520, 525, 528, 530, remove chains and extra links with ease and adjust the length of a roller chain. Replaceable press pin is heat treated and hardened, please be sure to verify that the push pin is aligned properly with the chain pin. Highly recommended to grind off the chain pin head before using this tool. This will significantly reduce the load on the tool and help prevent premature wear or damage to the breaking tips. Package Included: 1x chain breaker shown on the pictures, We focus on customer using experience and try our best to provide the best product and service for our customers, if you have any problems, please feel free to contact us! Part number: Y-420-530 Fit type: Vehicle Specific Material: high quality molybdenum steel. Fits chain sizes 420, 428, 520, 525, 528, 530. Package