Park tool chain tool replacement pins ctpas a manufacturer of bicycle specific tools since 1963 you can safely rely on park tools many years of experience the worlds largest bike tool manufacturer is the first choice of professional and home bicycle mechanics around the world features these pins fit park tools ct 1 ct 2 ct 3 ct 3 2 ct 5 and ct 7 chain tools made from hardened alloy tool steelbuy park tool workshop from chain reaction cycles the worlds largest online bike store