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