Zvizhinji zvezvishandiso zvinoshandiswa mumasuo emoto mortise makiyi ndeyemhangura, simbi isina tsvina uye aluminium alloy. Iko kugadzikana uye kuchengetedzeka kwekiyi kunowanikwa mune mortise gonhi rekiyi. Moto wegonhi mortise kiyi inogona kushandiswa senge anti-kuba gonhi rekiyi ine yakakwirira kuchengetedza kuita.