CTA Tools 1027 High Pressure Rail Adapter Socket Removes and installs fuel injector adapter from the high pressure rail to service O-rings For international trucks including DT 466 / 570 ht 570 Features 1" outer hex design & 20mm I D Use with 1/2" square drive tools Black finish California prop 65 - warning this product contains chemicals known to the state of California to cause cancer birth defects or other reproductive harm