I-GBM iwuhlobo lokugunda uhlobo lomshini wensimbi we-beveling ngokusebenzisa i-cutter blade esetshenziswa kabanzi embonini yesakhiwo sensimbi.
Iwuhlobo oluhambayo kanye nonqenqema lwepuleti elinesivinini esikhulu esilinganiselwa kumamitha ayi-1.5-2.8 ngomzuzu. Ngamamodeli GBM-6D, GBM-6D-T, GBM-12D, GBM-12D-R, GBM-16D kanye ne-GBM-16D-R ngenketho enobubanzi bokusebenza obuhlukahlukene bezinhlobo eziningi zeshidi lensimbi.
