ʻO GBM ke ʻano o ka mīkini beveling metala me ka hoʻohana ʻana i ka pahi ʻoki i hoʻohana nui ʻia no ka ʻoihana hana kila.
He ʻano hele wāwae ʻo ia me ka ʻaoʻao pā me ka wikiwiki kiʻekiʻe ma kahi o 1.5-2.8 mika i kēlā me kēia min.Me nā hiʻohiʻona GBM-6D, GBM-6D-T, GBM-12D, GBM-12D-R, GBM-16D a me GBM-16D-R no ke koho ʻana me nā ʻano hana like ʻole no nā ʻano ʻāpana metala.
