ALLOW VALVE SPRINGS AND VALVE STEAM OIL SEALS TO BE REPLACED WITH THE CYLINDER HEAD; FEATURE A REVERSIBLE JAW/ ADAPTOR A ND AUTOMATIC CAM-ACTION LOCKING TO A RE-DETERMINED SETTING; DIPPED HANDLE; SATIN FINISH BODY; BLACK OXIDE JAWS & BAR; AP PLICATION: OHV, OHC, CHV ENGINES, NOT SUITABLE FOR USE ON ENGINES WITH DEEP SEATED VALVES