Mkono wa Rocker mgalimoto ndi wokhazikika pazinthu ziwiri zomwe zimapangitsa kuti mphamvu yokoka ikhale ndi ndodo yomaliza ndikuchita ndodo yotsegulira valavu. Kutalika kwa mkono mbali zonse za mkono wa rocker kumatchedwa rocker mkono, zomwe zili pafupifupi 1.2 ~ 1.8. Mapeto a mkono wautali amagwiritsidwa ntchito kukankhira valavu. Malo ogwirira ntchito mkono wa rocker nthawi zambiri amapangidwa ndi mawonekedwe a cylindrical. Pamene rocker mkono wazungulira, imatha kutsuka pamaso pa chingwe cha valavu, kotero kuti mphamvu pakati pa ziwirizi zitha kuchita bwino kwambiri. Khoma la Rocker limayendetsedwanso ndi mafuta opangira mafuta ndi mabowo a mafuta. Chotupa chosintha kuti musinthe chilolezo cha valavu chimayikidwa mu dzenje lopindika pamtunda wocheperako wa mkono wa rocker. Mpira wa mutu wa screw umalumikizana ndi tee yokhazikika pamwamba pa ndodo yokankha.
Mkono wa Rocker wakhazikika pa shaft rocker mkono kudutsa rocker mkono wa rocker, ndipo mkono wa rocker amawuma ndi mabowo a mafuta.
Mkono wa rocker umasintha njira yopita ku ndodo yokoka ndikutsegulira valavu.
