Mwala wopukutira phazi ndi mwala wopaka phazi womwe umatha kupangidwa ndi midadada yachilengedwe ya pumice yokhala ndi mawonekedwe ndi mawonekedwe osiyanasiyana.Grindstone imakhala ndi zotsatira zolimbikitsa kuyendayenda kwa magazi kumapazi komanso mtima wachiwiri wabwino wa thupi la munthu.Panthawi imodzimodziyo, imatha kuchotsa khungu lakale (lolimba) la mapazi, chisamaliro cha khungu ndi kukongola, ndipo lili ndi mchere wambiri wopindulitsa kwa thupi laumunthu, lomwe ndi mankhwala abwino kwambiri a zaumoyo kwa anthu azaka zapakati ndi achikulire.