I-grinder yenziwe nge-alloy ye-aluminium eqinile kunye nekhwalithi ephezulu ukuqinisekisa ukusebenza kakuhle kunye nokuqina.
Amazinyo edayimani abukhali aqinisekisa ukugqwetheka okugudileyo kunye nesiphumo esifanelekileyo sokusila.
Igrinder yomelele ngokwaneleyo, kwaye ibonelela ngolawulo olungcono kunezinye iigrinder, ukuze ukwazi ukucoleka okanye uburhabaxa bokusila ngokuchanekileyo.