Umsiki wokugaya ophansi oyisicaba osindayo wenyusa impilo yesevisi ngo-20% uma uqhathaniswa nomsiki wokugaya ovamile.
Lolu hlobo lokusika lokugaya lungasetshenziselwa ukucubungula: insimbi engagqwali, i-carbon steel, i-SDK series alloy steel, insimbi e-abrasive njll.